I don't want to dictate peoples responses here at all, but mean it more in a sense of things that you could actually have done, not in an unrealistic wish lish sense iyswim?!
anyhoo, mine is that i have never lived in London. And am never likely to. I now have kids and my options are much more limited. I moved from a tiny village in scotland when i was 24 to Manchester and had THE best time of my life. I did loads of stuff I'd never had chance to do in Scotland and am so glad i made the move. Incedentally, i still live in england, albeit in a quieter village than i came from!!!
i dont know what it is about London, but i really wish i had spent some time there (not as a tourist). I am blaming the ariel shots from the Apprentice!!!
so what are your regrets in life?