All-time favourite anime music
As the thread title says, what are your favourite anime music? Be they OP/ED, insert songs or BGMs. I'm not talking about entire OSTs here, but specific pieces which mp3 you keep on your playlist long after the anime has ended, and/or which you find yourself playing every now and then.
My (rather short) list:
Cruel Angel Thesis (Evangelion)
Omega (Jin Roh)
There are other tracks from more recent shows which I really like, but I'm not sure I'll still be listening to them 2 or even 1 year down the road. The above 3 are the ones which I would say have stood the test of time.