I only have one ex, and I see him from time to time. We were in the same circle in college, so anytime anything happens with someone in the circle (wedding, birth of baby, etc.) I see him. He is still as arrogant as he was then, just an adult version of that arrogance. He's very successful, as I knew he would be - ruthless people usually are. I have no regrets about my decision to break up with him, I never thought he would be a good family man, and apparently I was right since his 2 marriages ended in divorce with no children. He has a beautiful home not far from where we live, a 6 figure salary, but really nothing much beyond that. Kind of sad, really.
I wish him well though, but he's not someone I ever really give much thought to.