I'm always in awe of Alex Lifeson's guitaring. For a supposedly ROCK guitarist, even in their most dense prog epics he can be jangling away like Peter Buck, or playing Andy Summers style offbeats or huge compressed open chords. Then he'll dive-bomb and widdly-squee like a proper metaller, or noodle like a old bluesman.
I was hooked by Peart's drumming, but Lifeson made me persevere with them. Ironically I started with Signals - their first real synth heavy album - and worked backwards from there.