I'm 27 and have spent most of my guitar playing years (since I was 12) playing the blues. I started off in hair rock and metal, side stepped a little into grunge, and then fell straight back into the blues. I have listened from Robert Johnson to Muddy Waters and Albert King (the guy that SRV and Clapton stole most of their licks from), to Buddy Guy and more recent players like SRV, Tommy Castro, and the like. The blues has been rehashed for so long, all the new players have to fight to put a new take on it. Robert Cray's blues is more in his voice than in his fingers, likewise with Bonnie Rait. Although, they both have very distinctive guitar sounds. I can hear any random song of theirs on the radio and pick out either player.
At this point, I have played on stage: staight ahead rock, big band jazz, more modern jazz, old school funk, new school funk, reggae, punk, honky tonk and country, bluegrass, ska, latin, fusion, acoustic, electric, Texas, Chicago, and all types of blues. The blues is almost everywhere and in every piece of music since it's inception.
There's still nothing better than hearing Muddy Water's slide solo on "She's 19 Years Old" and Buddy Guy's replication of it 30 years later. The new stuff is still blues like the old stuff, just different.
I would be nothing without the blues and I'd like to think I'm a rather accomplished guitarist.