I tend to go through musical phases over time, where I'll focus on a few artists/types of music for a period. After a couple years I'll want something fresh and redirect into a different genre.
Currently I'm listening to a lot of alt-rock. Mother mother, Future Islands, Glass Animals, The National, Sorority Noise, Hollerado, Cage the Elephant, and some Muse. A few years before it was funk/R&B (Curtis Mayfield, The Isley Brothers, George Clinton /Funkadelic / Parliament, Stevie Wonder, Tower of Power, Wild Cherry, Jackson 5, Prince, Marvin Gaye). Before that reggae (Bob Marley, Peter Tosh, Burning Spear, UB40, the Skatelites). Before that was some random jazz (Coltrane, Thelonius Monk, Dizzy Gillespie, Dave Brubeck, Billie Holliday, Louis Armstrong, Duke Ellington, Django Reinhardt), classic rock (Zeppelin, the Stones, Hendrix, Cream, Deep Purple, CCR), blues (Buddy Guy, Robben Ford, SRV, BB King, Albert King, Clapton, Robert Cray), folk music (Ani DiFranco, Barry McGuire, Bob Dylan, Simon & Garfunkle, James Taylor).
It just keeps going back further and further through the years. Weird thing is that you can pick any point in my life and I can immediately bring up a soundtrack that went along with it. :P