id say i like alternative (formerly indie) such as Franz Ferdinand, Kaiser Chiefs, Frattellis and the like. I prefer not to say i like indie anymore following the upshot of whiney poo masquerading as 'indie' (case in point, amy whine-house and the genre on teh whole sucks a fat opne now. all you need is a whiney voice, and acoustic guitar and a song with rhyming qualities similar to a poem written by a 4 year old.
Nowadays i like stuff like The Hives (fav band ever :D) Kula Shaker (seen them twice!) Foo Fighters, Bloc Party, White Stripes...
i love older music to be honest, my favs from the good old days would be The Who, Led Zepp, ACDC, The Beatles, Oasis, Blur, Supergrass (still going but having seen them live their new stuff sucks)
erm, much more, too early in the morning for a decent list