Casual, serious, underground and just plain stupid gamers

Im a gamer with a wide taste in games, i enjoy nearly everything, rpgs, fps, rts, tps (third person shooters), comedy (stubbs the zombie, dead rising) pretty much anything. I also play with a variety of gamers. Im a casual player, i jke around in game, but i still play it and im indifferent to losing as long as im killed in a stylish or hilarious way (except when my eardrums are assualted by someone shouting 'NOOB').  I enjoy the company of other casual as well (we play the game, but dont mind occasionally screwing around.). I hate playing with people are to serious, who cant see the humoruss side of accidently blowing yourself up with your own mine, as with underground (the people you mute because your eardrums cant stand there screaming insults) and i truelly hate people who destroy a good game because they think its funny to kill their teamates at the start or abandon you in the middle of a fight. 

If you havent guessed what im getting at here, i was wondering, what kind of gamer of you and whos company do you enjoy (or loathe)?