^ Well, I've made the mistake of listening to 27 of his concertos in a row. The redundancy gets to ya by the third or fourth.
Anyways, my favorite composers kind of stem from two separate routes - either through their musical philosophies or their actual music (independent of its conceptual implications).
Conceptually: Hovhaness, Wagner, Takemitsu, Mahler (kind of), Messiaen
Musically: Scriabin, Chopin, Villa-Lobos, Ravel, Liszt, Bruckner, Glass (shuddup), Reich, Grieg, Riley
Can't pick just one...