Currently Hatebreeder by Children of Bodom. OH. MY. GOD. BEST ALBUM EVER.
But the more recent albums I've been obsessing over are Hail to the King by Avenged Sevenfold, and The Marshall Mathers LP 2 (Yes, I listen to some rap too, as long as it has some meaning and good lyrics). Definitely better than anything he's released recently and almost on the level of The Eminem Show of awesome.
Beyonce by Beyonce. I think it's the first album ever that I can listen to all the way through without skipping a single track, it's that good. I have to have a playlist with just the songs and not the videos, though, because I don't like watching them every time and listening to three minutes of filler around the song every time is annoying lol