Eric Clapton
Possibly one of the best living guitarists. Awesome catchy riffs, while keeping it fairly simple.
I am currently learning 'Layla' in my own time. You will love it, no exceptions. It is a grade 1 piece. But I couldn't help myself.
http://www.youtube.com/watch?v=fX5USg8_1gA
^Link to song. Skip to around 40 seconds. It starts there.
Anyway, discuss.