I hate the creatures that have like 2 hp but are annoying as hell to kill. Usually bats. Those piss me off, I understand why they are implemented in games, but still They are found (or were found anyway) in virtually every Action/Adventure/RPG/Horror game ever made. They piss me off.
"Let justice be done though the heavens fall." - Jim Garrison
"Ask not your horse, if ye should ride into battle" - myself