My favorites include...
Jimmy Page - I like his choices of full step bends
Prince - When he played my guitar gently weeps it really opened my eyes.
Joe Satriani - Surfin with the Alien has some great riffs
Carlos Santana - My dad would cover him a lot on piano/accordion so I didnt really appreciate him until "Smooth"
Steve Vai - I love the metal/orchestral feel
Eric Johnson - love his use of octaves and falling scales
Brian May - Great layered harmonies that creates a brightness in my musical soul
Phil Keagy - Soul somber grooves
Tuck Andreas - my first introduction to jazzy fingerstylin
Randy Jackson - got to see him live when I lived in Long Island at a bar where I could walk right up to the stage