Actually, i like to mix some shred and blues every once in a while. It's actually really fun! Instead of your basic blues techniques you can throw in some others like tapping, or sweep picking, or throw some giant paul gilbert string skips in their. it's all up to you. Shred isn't all about speed! Actually when you really think about it, alot of shred music relates closer to classical music than anything else. People say some classical music has no emotion. which is blatently untrue. It has emotion, it just brings it out in different ways. it show emotion with complex melodical lines, and sometimes advanced skills and techniques. the same is true for shred.
It's not SPEED = EMOTION! (some people might get that :D )