I haven't been to many parties but I did attend a few last autumn.
-Crap music, Dark psy, yuck.
-Fairly young people super fucked-up on drugs like speed and ghb, not nice to see kids totally bombed out of their skulls.
-Also said kids seem to consider a goa/psy/whatever party, especially since they are usually held in more underground venues with not so much security compared to e.g a night club, just a place where they can do as much drugs as possible.
-Theft at parties, another example of the gimps in action.