I've had to leave everything behind me a few times. I miss it ALL. (granted, that's different from getting to choose stuff).
We're still in the "collecting" part of our lives. 3 people, 40k income, 30k in tuition and books (2 college, 1 preschool) didn't leave a lot of money to live on the first 4 years of our marriage/ son's life. Over the past 5 years we're SLOWLY getting to the place where we ALMOST have everything we need. Not want. That list is MUCH longer.
The one REAL regret I have is the ancient crib. My grandmother was in it. All of her kids. All of us when we visited. The same month my mum finally sold it (since no one was looking to get pregnant for 10-20 years), my son broke through 3 forms of birth control to be conceived.