I have a foreskin but keep it retracted all the time. Since my teens I found that it would slip back quite often by itself and stay there (usually after an erection or if i've been swimming) so I eventually decided to just leave it like that. I prefer it retracted since it makes masturbation more enjoyable (not too sensitive to touch but powerful orgasms) and I think it looks nicer, without the scarring accociated with circumcision.