Ugh, my most hated moment in gaming that was somewhat recently was when I was playing level 11 in DMC4. Everytime time I would get close, the guy would hit Nero back, and of course he ass is so slow, even with the sprint thing. So he would get me stuck in a corner, and my only saving grace was Nero's arm so I could grab the little orb things, thank gawd.
Also, my pet peeve for any online thing is when people bash young players. I myself am a young gamer-girl, and it annoys me that I am shoved into the same room as all the other trash-talking-i-r-awesome-kids that stalk the Xbox Live servers. I mean, not *all* of us are annoying! (Ok, yeah, I know a few that annoy the hell out of me, but still)
Thus why I don't like to play online anymore when people figure out how young I am and say, "ZOMG IT'S A NOOB-Y KID, RUN AWAY!!1!" Yeesh...