biggest factor of good sex:

foreplay

I like being prepped up, loved, felt.. touched, feeling the intensity, leading up to sex

my fiance does it half the time, but when he doesn't, it's just in and out

I had a big big guy once, it was good and he liked me... but.. nothing compares to having sex with someone you love, than just... having sex. but if I was single, I would go for decent or even big, it's in a spectrum really. not too small, small-medium would be good too, but I want foreplay gah