I really like Meg White from the White Stripes, Her technical grooves and complex playing shows she's a true master of her instrument
Only Kidding I really love George Kolias for his blistering, unrelentless speed and i've always loved Vitek from Decapitated. The Negation was the first death metal (well metal album PERIOD)i heard and i instantly fell in love with his playing. Its a shame he died. Gotta love Thomas Hakke, just listen to the track BLEED of there new album. It makes my underwear go all sticky.
Akira Jimbo is a phenominal player. He's not metal but he is quiet obviosly some sort of robot i advise checking him out, and Thomas Lang is another killer drummer, but he's also a fantastic teacher. Tony royster jr is a amazing drummer and is always enjoyable to watch.
There are so many drummers i like its difficlult to choose a favorate, but if i had to i would choose i would have to say Flo Mounier. He is so quick and agressive and his grooves sound real cool.
Sorry about the long reply i got kinda lost in my own words.