I think I have a decent one. Lol. I would offer for you to give your opinion but I know you have a gf so I will not. Lol
The hardness of the shaft when i grab it. And shove his thick hard dick in me. The ridge around the tip when i suck it. I actually love kissing, sucking, licking every part of his dick.
I loooove the tip. I think the fact of when my husband fucks me slow the feeling of the tip drives me wild!