it's only happened to me once so far and i loved it.
i like a little bit of slobbering. Really working that head with your tongue. Deep thoating. licking up and down the shaft.
But one thing i like is the licking around the cock before you get to it. I love the suspense and it makes it that much better.
woken up in the morning with a blowjob. The girl initiates the sex.