Honestly there are just so many guitarists I admire, it's hard to kind of narrow it down.

Chuck Schuldiner
Paul Waggoner
Tosin Abasi
Randy Rhoads
Zakk Wylde
Yngwie Malmsteen
Steve Vai
Jeff Loomis
Paul Gilbert
Michael Romeo
John Petrucci
Eddie Van Halen
Eric Johnson
Joe Satriani