Wow... what a list that would be. I have so many! If I could choose 2 (okay, 3), I would have to say Ozzy Osbourne, Kamelot, and Disturbed. Those are just the 3 I would choose off the top of my head.

My fave would be Kid Cudi with his great songs. Listen to a few of his songs

I can't think of much i never favor a band for too long but i guess the closest is Led Zeppelin

There are many..but my absolute favorites are Joy Division, The Smiths, The Pixies...and some ex-Yugoslavian new wave bands like EKatarina Velika (Catherine the Great), Azra and Termiti

My favorite artists are LMFAO,Down With Webster and Emneim

Smashing Pumpkins.

I first heard "Today" on Rock Band a few years ago, and I thought it was great.  Then I sort of forgot about it.
I don't remember why, but I thought of Smashing Pumpkins when I decided I'd try to get into music a bit more. (I had just gotten an 8GB iPod, and I didn't have much music [or even interest in bands] at the time.)

Mellon Collie and the Infinite Sadness was my first SP album.  When I opened the case, it smelled like hippies.
I listened to the first disc, and Billy Corgan's slightly-whiny voice bothered me.  When the disc finished, I stopped for a while.  I really had my hopes up for liking this band, especially since I had waited two weeks for it to arrive.  Later that day, I put on disc two to see if it was any better.  It was about the same, but the vocals weren't so bothersome.  By the end of the album, it had really grown on me.
However, I didn't look at the tracklist before I ordered it. "Today" wasn't on it.
That prompted me to order Siamese Dream.  I fell in love with the band forever.

Second Favorite: Radiohead
Third Favorite: Cage the Elephant

I my favorite artist are Tegan and Sara

Well, favorite composers would probably be Tichelli and John Williams, but I don't know if I can pinpoint a band. I suppose I would say Bowling For Soup. Others would include Weird Al, but to pick one would definitely be BFS. 

My are Red Hot Chili Peppers, Johnny Cash, and Nirvana!

My artists change a lot. I love April March though! I shall love her till the end!

John Lennon for Imagine, my favorite song lol.

Keith Urban is my second though.

My favorite artist right now would be Story of the Year almost exclusively.

My favorite artist right now is gotye he's just so cute and his songs are amazing.

System of a Down. These guys have came and went, but I still listen to their songs to this day. Its a shame they broke up a couple of years ago, but they went on a reUNION recently, which is a good sign that they can reunite any time.

Led Zeppelin & Pink Floyd. they completely changed my musical preferences.

Mine would be between
- Eminem ( Because he is Marshall Mathers do I need to say anything else )
- Pitbull ( Because of some amazing English to Spanish back to English rapping )
- Lindsey Stirling ( probably one of the unknown ones but I love listening to the amazing skill used to mix what would seem like two incompatible genres of music and making them seem amazing together and making an extravagant hybrid and also because it seems that when ever I play basketball her music seems to help me )

Have added these eight words to post 100 words. 

Mine has to be The Symphonic Rock/Metal Band Within Temptation.

Listen to their songs, you have to!

Best Female Metal Band ever.

Although their music videos aren't that good, their songs are the best!

Right now, I'd have to say Attila, hands down.
It's metal yeah, but they're just so different. (:

My favorites are cold, linkin park, and 3 doors down

For me i gotta say radiohead because the lyrics 'just get me man'  although i do have a soft spot for muse still and despite what everyone keeps telling me i think they are a brilliant band and have a lot of talent especially Matt Bellamy ( i think i spelt his name right) but yeah those kind of bands really. If I had to pick one for sure though I think I'd have to go with Radiohead, just because I've been listening to them a lot recently.