Cocks with big heads are some of my favorite. It doesn't matter cut or uncut but It does make a difference during the cumshot that the skin pulls back behind the head. It's awesome to see the head flare.
My wife loves thick cocks only, especially if the head is swollen. Length isn't as important as girth and drives her crazy when first going in her pussy. Soooo hot watching her lips wrapping tight around the head and shaft as he fucks her!!