Left 4 Dead, Great game, Rubbish Chracters?

i think the characters fitted it. the only weird one was the old guy. i think the girl, biker, and black dude was good. its not like the really ruined the game.. they dont have a specific story behind them. who knows that girl couldve been a police officer. the biker wasnt even weird looking and the black guy wasnt a coward he was like the smart one or something. its just a game and the characters didnt ruin it at all. they just wanted to make it random people that would live in any city. theres always a veteran, hot chick, smart black dude, and biker dude in some cities haha