Drums/Hardware: Tama
Heads: Evans
Cymbals: Sabian
With that said, I actually have a slight preference for Pearl drums over Tama, but I prefer Tama hardware to Pearl, but only just barely, and mainly because of their Iron Cobra pedals.
Heads are tougher - I use stuff from Evans, Aquarian, and Remo, depending on the drums (snares, in particular) but I'd have to go with Evans because I wouldn't want to give up EMADs.
Cymbals are easy - I started off with Sabian cymbals because at the time I bought my first pre-pack, they were less expensive than either Zildjian or Paiste, and I've been almost exclusive to Sabian for over 15 years. Then again, I did just pick up a great set of used Zildjian New Beats that I'm pretty taken with, but it's my understanding that Sabian AA Regulars/Mediums are essentially the same thing.