I went through rush this past fall, so I can only tell you what I liked/disliked as a rushee. Sorry if it isn't helpful.
-My favorite was a variety show type thing, with songs from rap to country, with the words pertaining to their house.
-I was ambivilent towards a disco theme, with songs from the 70s & 80s, and a night club aura
-I did not like a TV commercial theme, with popular commercials remade to promote their house
I went to one other house on skit night, but I can't remeber what they did. That says a lot about their performance, doesn't it?
Hope this helps.
Heidi