Led Zeppelin, Wolfmother and Audioslave are propably my favourites. But I listen to a lot of bands (Nirvana, QOTSA, Rage Against The Machine, System Of A Down) .
Radiohead, Red Hot Chili Peppers,Smashing Pumpkins,System Of A Down & Muse when they made Origin Of Symmetry(you know they werent always the shit boyband they are now)
Favorite of ALL TIME: Marilyn Manson, followed by, in order, NIN, APC, Aerosmith, AC/DC (why did they get no love here?), and recently I've been on a QOTSA and Rush jam. Rush's Clockwork Angels and Vapor Trails are AWESOME! They dropped out of the consciousness a long time ago, but, to me, they keep getting better and better! Coincidentally, QOTSA's latest is called "Like Clockwork". Global subconscious, maybe?
The Gaslight Anthem, Nirvana, Rise Against, Linkin Park. First band I ever listened to was Linkin Park when "In the end" came out. Their album Meteora got me through my teenage years.
It's so hard... but lemme try. KISS, Iron Maiden, Avantasia, Edguy, Helloween, Blind Guardian, AC/DC, Black Debbath (no, not Sabbath), Bruce Springsteen, AC/DC etc etc..
It might depend on my mood when listening, but I like the rock style of Beatles, Rolling Stones and Linkin Park
Recently I have listened a Korean rock style of Kim Jaejoong, it's so awesome, I love it so much, 2