I have no preference. Have been with both (although more cut than uncut) and as Ali said...once they are up...you dont notice.
A friend of mine, a few years back, used to have this *uncut* guy as a fuck buddy, it was well known (I thought) that he was uncut and I knew my girlfriend had a very big *ick* factor about it.
One nite she called me doing the *omg, omg, omg!!!!!!* thing in the early hours, because apparently for the first time in 4 mths, he had stripped off before he was ...umm...up and she saw him in his natural state.
Poor bloke, she apparently squealed like a girl and made some feeble excuse about going to get smokes.
I was like Wtf!
Chicks are weird sometimes