My money would defenantly have to be on the predators. Half of the marines from that squad were a bunch of wise cracking, gung-ho hooligans looking to shoot something, even their leader Lt. Gorman was completely incompetent. Only a few of the marines seemed to handle their respective situations well (needless to say, Hicks wasn't one of them). In truth, the hardest of them all had to be vasquez, I mean come on, she pinned a warrior against a vent wall with her bare hands & started blasting into the side of it's head, that takes some serious strength, although she was fairly careless & arrogant as well, as she was one of the ones who continued using her smartgun, disobeying direct orders not to use bullets when they were inside of the hive.