I like the cock heads with some "give" to them, a bit (or a lot) spongy or soft. The difference between that and the hard shaft is such a turn-on, you can feel the difference in your mouth and on your tongue, mmmmm

I like that my cock head is nice and spongy, about half way between totally hard and really soft (the really soft ones might well turn me on the most when I suck a cock, plus they don't trigger my awful gag reflex as easily when they're down in my throat). It's nice to know my cock head provides that little extra pleasure to the mouth of someone sucking it, if they appreciate that sort of thing like I do.