Used to be bigtime into hardcore/punk. Even was a straight-edger for a few years. But hardcore pushed me to explore other extreme genres, and that eventually got me into metal as well. From metalcore (Converge, Dillinger Escape Plan, Killswitch Engage, Hatebreed, etc.) to the real deal. Really enjoy the technical aspect of most metal, and I enjoy quite a few sub-genres.
One of the best and definitely most innovative metalbands of the past decade is undoubtedly Mastodon. Saw them just once, back on their 'Leviathan'-tour and even then I felt I was witnessing something great, back when they were much rawer and 'underground' (to use a vague term mainstream journalists apply when it comes to music beyond their expertise). Can't wait to see them on the tour of their latest and most accessible album to date, 'Crack the Skye': definitely in my album-list of the year.
Other than the innovative stuff, I enjoy the typical genre-bands as well. Quite a lot of stonerrock (silly term, but hey, whatever floats journalists' boats), sludge and doom: the old Kyuss obviously, Fu Manchu, Monster Magnet, Orange Goblin, Weedeater, High On Fire, Facedowninshit, Electric Wizard, Isis, Neurosis, Earth, etc.
Also enjoy the occasional thrash-, black- and deathclassics and contemporaries (Suffocation, I think, is a brilliant band).
And the classics ofcourse, like Motörhead, Sabbath, Led Zep, etc.
Pretty much it...