this is my kind of topic

lets see.
shostakovich - my favorite, his symphonies , quartets, violin and cello concerto
are amazing, everything from his mid and later period(dark and depressing, check out string quartet n15) is amazing. (not too found of his first compositions, too jazzy and goofy)
He is great. I especially like Sym. 10. The first movement is immensely dark, liking going to a Gulag.
arvo pärt - spiritual , emotional minimalistic music, awesome chorals, check out cantus in memory of benjamim britten, so much emotion, beautiful music.
My favorite contemporary composer, probably along with Gorecki as the master of getting maximum emotion out of the smallest simplest ideas possible.
beethoven - love his piano works, symphonies (not all of them, the minor key ones are the best)
Me I love all his symphonies... but 3, 6, 7, and 9 are supreme.
bach - the master...
Indeed, at one time my favorite but now I have too many favorites to choose from.
then a lot of other composers, stravinsky and bartok are amazing as well, mahler for the big epic symphonies, dvorak symponies are cool too, sibelius as some beautiful music, allan petterson with his death symphonies, gorecki
of course, rachmaninov his piano concertos and the isle of the dead are great. i'm not too found of mozart but i have to give props to him for the requiem, masterpiece!
Aw man! Mozart is the bomb! Check out Don Giovanni and Piano Concertos 20-27 if you haven't already.