Stoner Rock is pretty much my main preference these days.
High on Fire is at the top of the list along with Orchid. Orange Goblin is a favorite and I still spin Alabama Thunderpussy quite a bit. Kyuss and Monster Magnet still get played a lot and the new Vista Chino is really good.
Red Desert, Summoner, Electric Wizard, Bongripper, The Sword, Akuma, etc.... I could go on for days here.