GL is my favorite DC hero, but Super-speed has always been my favorite super power of them all.
GL has been VERY good recently, ever since Rebirth. (and Kyle's always had good stories in the JLA) But a few of the stories in-between grand events started off not as good as the big epic ones. Everything leading up to Blackest Night was class, though, and Brightest Day seems quite good so far. I just hope they start developing more of the characters we have so far before introducing any new ones. Setting up how the new regular canon will be, I mean.
Superspeed allows authors to do pretty much ANYTHING. Wally's gonna die? Outrun death by running into the future so fast that the concept of death no longer has meaning. Barry's in space, far above the Earth? Make him vibrate in time, bringing the Earth to him through regular rotation. Superspeed's one of those powers where the heroes have to get creative with its use. That's what makes Flash books good.