Just do it.
Rock
Okay, I like my rock, deep, aggressive and very repetitive. Kinda like a slow, but unstoppable army crushing everything in the way. 2,000 King Tigers under an umbrella of an Air Fleet of Stuka's, moving at 5 MPH, but with no intention of stopping.
Needless to say, guitar solos and the wildly deviating sound associated with them aren't to my liking. 
- Rammstein
- The 5.6.7.8's
- Korn
- Gravity Kills
- Static X
- A Perfect Circle
- (Not Early) Fear Factory
Dance/Techno/Rave
There's all kinds of experimental stuff out there, and a lot of Avant Garde crap. I like repetitive bass, and a funky little squealy tune. I don't really know of any "bands" per se, but there are some songs. Overseer also isn't just dance. It's a variety of genres, however there's always a... erm... "phat beat"... in all the songs, so it kind of is dance. It doesn't really fall into one category.
- Prodigy
- Overseer
- Ozone
- Zombie Nation - Kernkraft 400
- Da Rude - Sandstorm
- DDR Music - Bumble Bee
Hip-Hop
Funny. That's pretty much it. I'm not a great proponent of Hip-Hop, but I do enjoy a good laugh. Or just really catchy music.
- Ludacris
- DMX
- Mannie Fresh
Country
Just like Hip-Hop, anything funny, or perhaps anything having to do with Texas - The best damn country on Earth!
But I like most old style country. Just a man with a guitar. 
- Johnny Cash
- Showdown - The Rodeo Song
Pop
I never thought I'd like Pop, but I have found sub-genre that's quirky enough, and slightly repetitive enough to satisfy my liking: JPop. God bless the Japanese for all they've contributed eh? Hello Kitty, supercomputers, square watermelons and, erm, Hello Kitty.
- Puffy AmiYumi
Classical
If you were to make a movie of Operation: Barbarossa, and if you could put the song in the background, then it's a good classical song.
Militaristic, goes without saying. Games supply a good source of militaristic, classical music. Not limited to just European classical either, classical styles from Japan and the Middle East strike up me fancy as well. I don't know of any band that plays the Kodo drums, but anything with some good ol' Japanese Kodo drums is good. Back to Europe, violin, piano or opera solos are good, but usually only the mellow ones. Happy classical music is akin to guitar solos. - Russian Red Army Orchestra
- Hossam Ramzy
- Beethoven
- Wagner
- Hanz Zimmer
- Carl Orff - Carmina Burana
- Samuel Barber - Adagio for Strings
Other Genres
Big Band and Doo Wop and that vocal stuff that doesn't fit anywhere else. I'm not too familiar with them tho'. I just know I like 'em.
- Big Band and Doo Wop
- The Andrews Sisters
- Vocal
- Sasha Lazzard
- Meiko Kaji
Overall Favorites (In Very Particular Order)
- Rammstein
- The 5.6.7.8's
- Russian Red Army Orchestra
- Puffy AmiYumi
- Sasha Lazard
- Korn
