I love giving head, but don't run into many guys that do that. One friend has a couple times, and I'm gonna talk to him about Not doing that.
I get that it can be "hot", but not what I like, for a few reasons. One of the big ones is I like to feel cum shooting into my mouth, and tasting it. The other is I'm just not into the Dom thing.
I think a lot of guys Don't ram their cocks deep, because the're letting the sucker do his thing, show his/their skills at going down. And, for a lot of guys, all their sensation is in the cock-head. Some guys go crazy with light action on the head. Me too.
Anyways, not all guys. And for some, it's what gets them off. Each to their own.