I'll preface this by saying I'm a chelsea fan.
Drogba - Keeps acting like he is bigger than the club. Mouthy little bugger who doesn't chase lost balls and poaches. Amazing goal-scorer though

Barton - Irresponsible
Patrice Evra - Dirty player
Ronaldo - Doesn't like to pass, diver, dirty player. Bloody good footballer though.
Mikel - Stop being so bloody violent!
Viduka - Made the mistake of moving to Newcastle, played better for Boro
Probably more.
I personally think that Gerrard is as good guy. I listened to an interview with him recently and he seems like a really sound bloke.
To people who says they dislike a player because he's ugly: Get a grip.