well i must admit
i DON'T EVER carry records that i don't like in my box.
however i am a raver myself and i know just how shit it is when your out there having a great night and some total prick of a dj comes on and just ruins it (one way or the other)
i've got plenty of different styles in the box so i can play slower/funkier/harder/acidy and what's more is I LIKE ELECTRONIC MUSIC!!!!
ALL OF IT!! (well maybe not all but you see what i'm driving at here)
what drives me nut are the guys who only like a tiny piece of the vast array of music that's out there and that's all they have to say to you (the danceflloor)
in short if you are a dj you are employed to entertain people and it's the promoter who should concentrate on making sure you fit in.
you have to be everything flexible/proffesional/polite/freindly(even to really drunk blokes who scream in your ears)and above all

DON'T PANIC!!