My music preferences has changed over years. Having that in mind i will tell you that my 3 favorite styles along years, was going this way: Being child i listen only Michael Jackson, from 16 to 26 i really focused on Psychaedelic trance, from about 26 to 30 i've been listening disco and classical, and till today a mix of all.
MJ, stills my number 1 (when i listen to it i really travel to past times of my life).
From the world of trance it's very hard to put a number 1 on a single album, but i can say that "The Lone Deranger" from Hallucinogen (Simon Postford), it's probably the trance album i listen more times in lot of situations. Also a very new song from Juno Reactor of the "The mutant theatre" album, called "Return of the pistolero", make me fill these days the powerfull fellings, trance made me feel in the old days. I'm 40 at time.
From Classical i will trigger the Wagner Ride for the Walküre complete Opera.
And in the disco side, an album that i think is the better for me is a relatively new one, from Daft Punk "Random Access Memories".
I will specially name here "Rage Against the Machine, "Rage Against the Machine" album, as out of what i've talked is my over time album.
Green Regards!!