I believe it is all due to perception. In was born in 1954, back in the 50's GreTsch was putting out guitars with western motifs, G brands on their body, horseshoes and bull heads on the headstock, fret inlays. Chet Atkins was the poster boy for the brand. What self respecting blues player would play with those guitars? Sure there were other Gretsch that didn't have the motifs but they were guilty by association. Moving to the 60's George Harrison playing his big GreTsch guitar. I remember thinking that isn't a rock and roll guitar that is a country old man guitar, he needs a cool solid body guitar. Despite my thoughts GreTsch popularity grew but in the rock and roll genre. Then later in the 60's GreTsch was in the spotlight again with the Monkees TV show. The show was a comedy aimed at the young teenage crowd. GreTsch comes out with the Monkees model. It was a good guitar but, no rock and roll or blues player would be seen playing one. At this point GreTsch goes into obscurity. Finally the 80's arrive and the Stray Cats come on the scene. Here is a band that is playing something exciting, new and old at the same time. There is Brian Setzer playing that big Orange Gretsch and he make it look and sound sexy. That was the first time I thought wow, that Gretsch is cool I want one. Yes Billy Gibbons is a great blues player and he plays a Gretsch Billy Bo but, most would put ZZ Top in the rock and roll genre. Still dispite GreTsch having a lineup of great guitars that can play the blues no blues greats have made it their main guitar. Hopefully one day a budding great blues player will shirk tradition and play a GreTsch breaking the perception that GreTsch can't play the blues.