Hey man, welcome to the club. I'm a 'blues-based' rock guitarist originally, just this past year branching out to .. metal I guess. Back when I was starting out, Clapton's Crossroads with huge, you know and all the major blues players, SRV, Hendrix, BB, Muddy Waters, Zeppelin etc. Then I went deeper into all the old classic guys (too many to list). Can't say there's any specific killer riffs that I picked up (all just general feel and my whole solo repetoire is killer I guess you could say. lol.) Right now I'm digging Albert Collins 'Ice Pick'. My favorite blues artist is Buddy Guy I think, besides Hendrix.