R.J.
Fun!
When I was a kid:
Nothing gets opened until Mom & Dad are up. Since they spent half the night wrapping and assembling, and we were up at oh-dark-thirty raring to go, I remember a lot of prodding and pushing and c'mon!!!!
Santa presents first. Then break for brunch. Then tree presents. We lived thousands of miles away from family, so all our presents got shipped to us.
As an adult... the FUNNIEST year (looking back) was when my son was 3. We woke up to him at bouncing us awake. with. an. un. wrapped. present. in. hand. at. 530. He'd gone in and unwrapped everything. Headsmack. Kiddo! (and yes. Even our presents. Nary a shred of paper was on a gift)
How we actually do things, however, is a day early.
New PJ's get unwrapped on xmas Eve (the 23rd in our house). We see Santa (in PJs). Get pictures. Go for a drive and look at lights. Come back. Shoehorn kiddo into bed (the one day a year we ALLOW him to pee out his window. Long suffering sigh. Boys! I'm raising Calvin over here!). My husband goes to bed. I wrap everything and get stockings set up. Kiddo wakes up, and we spend all day unwrapping presents. He REALLY likes to play with each thing he gets as he opens it. So it's a prolonged process. We have an open house / visit other people in the evening depending on the year.
The next morning (25th) we head over to my mum's. SAME pattern as before, but none of us get there until 11/noon and my dad has been up since 5am phoning (in payback, I think) wanting to open presents. Santa gifts. Brunch. Tree presents. Lounging. Dinner. Birthday cake (we have 3 bdays on 12/25 at her house every year... even more people were BORN on xmas, but that's who is over at her house)
We moved things a day early, because it wasn't fun having to rush through OUR christmas to get to theirs. This way we have a relaxed christmas we can actually enjoy at OUR house, and then the next day head over for 'round 2'.