My all time favorite is Aerosmith. I never get tired of their music.
Close behind would be Bob Seger, Bad Company, Eagles, journey, Foreigner, Black Foot, Molly Hatchet, and Lynyrd Skynyrd. That covers my most listened to Rock & Southern rock bands.
My favorite blues rock bands are ZZ Top, Allman Brothers, Black Crowes, Edgar Winter, Rare Earth, Cream, and The Byrds.
I also listen to Ozzy Osbourne, Black Sabbath, Dio, Judas Priest, and Iron Maiden quite frequently.
I'm very eclectic