Too much slobber.
Guys who try to be sexy by breathing really hard into my ear. A little ear play is nice but there are limits.
I hate it when the guy just collapses on top of me when he is done and crushes the fuckin life out of me. It is really hard to push that kind of dead weight off. Can't he wait a few minutes before passing out?
And I HATE when we're using a condom and the guy just stays in there forever. Seriously don't they read the friggin instructions? Pull out damn it!
And...I hate it when guys just won't go home after. If I want you to stay then I'll let you know. If I get up and put my clothes on and start going on with my life then that is probably a good sign that you should leave. I especially hate it when they stay well into the morning when I have made it clear that I have shit to do.