I don't regret getting married at 19, even though it was a mistake.
I don't regret deciding not to apply to veterinary school. Especially as I see my debt dwindling instead of increasing dramatically.
I don't regret working for my dad for so many years, even though many days were emotional torture. Some day I'm going to look back and realize how important it was to spend so much time with him and get to know him so well.
I don't regret moving back home after my first year away at college, even though it meant losing my free ride. I needed to be here and I'm glad I came back.
That's great that you can look back on decisions that were hard to make and not feel a sense of regret. I think not having regret over some of our major decisions in life is a skill we must learn, or it can eat us alive. I spend a lot of time regretting things, and it is such a waste of time. Have to remember life isn't a race, a competition, or a game. It includes elements of all three of those, but on the whole life just is - and if your heart is beating and there's hope, just relax (wish I could practice what I preach more often).
Let's see, non-regrets...
Cutting off communication with my grandfather. He's extremely controlling and emotionally abusive.
This is a silly one, but... I had my belly button pierced and I ended up taking it out because it healed crookedly. Now I have a small scar, and sometimes it bothers me that it's there, but then I remember that if I had never gotten it pierced I wouldn't have known what it's like - and I was really curious. I loved it while I had it. Miss it too.
I don't regret not going through with pre-med. There is no way in hell I could have done it. Tutoring in math is great and all, but I got plenty of tutoring and I was still lost. I need like a two-year remedial math program to even have a shot.
That's all I can think of right now. Hrm.