I like the ridge around the head of my cock because it's very sensitive. I like feeling her mouth or pussy caressing it as her head moves up and down on the shaft. I like the feeling of it going in and out of her pussy or other regions associated with her body.
Yes , I like the ridge as well - it's soo sensative. I try using small / medium sized diameter penis rings just behind the ridge to make it look bigger! I don't risk too small a size ring thou - want my knob still intact LOL!
If it's a nice looking one, I love the head, especially the way it expands to be a bit bigger than the shaft. If it's not such a nice looking one I probably prefer the shaft part.