Adults that wasn't wild, or partied alot when they were in college/younger, do you regret not doing so?

I'm 28 now, getting close to the big 3-0. I wasn't one of those kids that partied much, had tons of sex in college, or traveled alot. I'm torn on if I regret it. I like who I am. I'm just pretty boring. I work alot. That's about it. I see these kids nowadays having fun and I guess it just peaks my curiousity on what I would be like if I was like that. So, do you regret not doing so? Or those of you who did...do you regret it?