Yeah I second, or millionth that (don;t remember how many people have already said this) but listening to different styles definitely helps. There is alot to take from blues in my opinion. To me it's the most expressive style on guitar, and can really add to rock and metal players since all three are (common) pentatonic based. So it's definitely worth a look to any rock guitar to see and learn how blues players use pents and the almighty blues note.