The totally amazing thing about you is that most people who are like this, don't KNOW that they are like this. You should be very proud that you "get it". Yes it's only the first step, but for real, I know so many people like this who would never admit to it in a million years and really do think that the rest of the world is annoying, not that they have an attitude problem.
It sounds like you may be suffering from "My life is so good that the bar is set really high and any L. thing annoys me" syndrome, and you probably caught the bug from your mom.
My good friend has a wealthy successful husband, they've been together her whole adult life and she's never struggled for one day or missed a meal. While some of us were single and fighting to survive and chewing our way up the shitty job ladder with hard and numerous jobs and no help in bad neighborhoods of LA, she was already in a nice house in the hills with a nice car and a fun part time job at a glamorous spa "to occupy some of her time" by age 23 hosting fancy parties, meeting stars and wearing beautiful clothes. Fast forward the the present, she's still living the same way, she's 40, they're now literally mega rich, and all she does is whine. Her kid drives her nuts, she has a nanny, and all she does is complain about stress. She's on meds. Her mom is the same way. Always complaining.
I'm one of those people who has 3 kids under 5, my husband always (and I mean ALWAYS) travels for work, we have a massive IRS problem from years ago when an ex manager of his screwed his whole band. It's a full time stress out and I'm the only one here to deal with the terrible notices when they come and assemble the response paperwork which takes weeks, it's been going on now for years, we are always on a tight budget, we want to move but we can't, I wanted to move out here to boost my art career after 20 years working like a dog in an industry I didnt' like, but I don't have a minute to myself. No nanny, no housekeeper, I take all three kids on every errand I do. I do all the housework and bills, etc. We're in debt from child deliveries with no health insurance and not having it stresses me out now that we have kids. And I never (well almost never) complain.
This is largely because I truly feel blessed. I don't try to feel blessed, I do feel blessed. No matter how crappy the finances get, it's still better than when I was younger and living in dumps breathing crack smoke through the my crappy apartment windows in dangerous neighborhoods and wearing thrift store clothes trying to stay awake working three jobs alone in LA never having time or money o do anything fun. And I was still recovering form a broken back from an accident, so I was in pain. And then moving to NY was even rougher for a while until my jobs started paying more. But I always knew I had so much more than so many other people. Even if it was just potential and opportunity.
And when I quit work to stay home with the kids, to me it was so much easier than working, and I was grateful for my new cushy life home with a baby, which was so much more rewarding. Now I'm thankful every time all of us come in from errands in one piece, no car accidents. I truly believe anyone with healthy children has no right to complain about anything. I discipline the kids calmly and firmly and fairly. I dont' yell. When I feel myself getting aggro I keep quiet and give myself a break.. Shake things up, get out to the park.
I'm the one making sure every outing is fun-even if my husband is there and turns into a whiny kid himself- and we find the interesting things in the details even if all our plans our falling through. If I'm exhausted and not feeling happy, I just stay quiet for a bit and let the kids have fun. It always passes. I would never want to set an example of ungratefulness to the kids, and I honestly don't feel it either.
Just this morning, I needed an extra hour of sleep, hubby's not home, one kid woke me up by spilling something in the bathroom, the other tried to pour his own juice and spilled it everywhere. I never get angry at accidents-by conscious decision and a rule to myself, not because I was born angelic. I rolled out of bed and made a big joke out of it and acted like the monster who eats kids who get up to early and spill things and sent everyone shrieking so I could get to the mess without them getting in the way. Since they are firmly disciplined for wrong actions (not accidents), they are super well behaved and that makes my life easy too. I can take them anywhere. We have fun all the time.
One thing that really helped me when I was younger (your age) and used to be more uptight about details, like if a trip didn't go just the right way, we didn't get just the right room, or right table at the restaurant etc. was to decide in advance to have fun that day, and not leave it in the hands of the specifics. It took a breaking point about 10 years ago after struggling "too long" in my mind at the time, to start putting me on that path, where I had to accept that life is hard, but precious. Embrace the hard parts!
We just drove to visit my husband at his Philly show, and everything went wrong. He kept apologizing for not being able to show us a good time as things went wrong when we see him so rarely. I kept reminding him, we were just there to spend time, and it was great.
Nothing about the trip was "fun for me". We weren't seeing art, we weren't doing anything I wanted to do, it was hard hauling the kids around to his events without his help. No one paid attention to me-it was all about my husband and the kids. I haven't had a single break from the single mom grind in over 10 months. But I had vowed in advance to have fun on that trip no matter what, and we did. We actually had a blast and his peers wanted to keep us around. I had 10 new facebook friend requests waiting when we got home-weird because these were all very "happening" sort of people who I thought would be bored by his "family".
Keep working on counting your blessings and asking for strength. You may want to ask your hubby to let you go on a "self spirituality retreat" where you have to go do something really hard in an unpleasant place for a while helping others, so you appreciate your life more when you get back. Nothing compares to real life experiences. I know you wouldn't want something truly terrible to happen one day and to look back and realize you didn't enjoy what you had when you had it. Good work acknowledging this and don't stop working on yourself. You can do it. Look for books. A New Earth is pretty good at getting me to center and not compound things for myself.
Don't feel bad if you snap now and then, you're human. If you work on this it will happen less and less. One day at a time. Get exercise, eat right. I couldn't function if I didn't dump the kids in gym daycare 3 times a week and stay in shape. Take the kids to do some volunteer work, it really does make everyone feel great. Take care of yourself. Love yourself! Love your life! Make fun times, don't wait for them to be served to you.
ooh, also, I too had to disassociate myself form my mother's personality. Do it. DON'T BE YOUR MOM. You DON"T HAVE TO!!!