I've gotten into going down on her after some intense fucking, and cumming inside her. Sometimes I can taste it, sometimes not, but it has never been a factor either way.
Like was mentioned earlier, I still kiss her after she goes down on me, so not much difference.
I once had a chick that wanted us to kiss and pass my cum back and forth in our mouths after she went down on me. If you would have asked me if I'd ever do that I'd have told you no way, but sometimes in the heat of battle, you just forget where your lines are. It wasn't something that I want to do all the time, but to be honest, with someone as into it as she was, I'd do it again.