I think just like facial, body clothes, etc. appearances, we all have preferences when it comes to genitals. There's vaginas that are extremely attactive, and send me over the edge ust looking at them. Then there are some some that actually can repulse me (I would never disrespect someone enough to actually tell them that). And same goes for cocks. Some are beautiful, and some are just plain funky, lol.
My absolute favorite is of a decent size, just enough of a foreskin to cover the head, and lots of veins.