I play a mix of rockabilly, old school country, swing, jazz, and blues. I rarely ever slap, but here is my two or three cents. 1. I've only been playing for two years. It's much more important to me to learn good left hand technique and try to develop consistent intonation. Some guys that get into it for rockabilly only care about the clicks. 2. I like seeing a good a slap player. I marvel at some of the guys that can land a note in time while doing all of the other percussive stuff. It's a real skill to behold. I don't like seeing a guy/gal who only knows how to slap the instrument, and can't do anything else. Every song does not require slap bass, just like every guitar solo doesn't require tapping, whammy, shredding, etc. It's a technique that sound great when done well with appropriate song selections. 3. As much as I love rockabilly music, there are cliches with that scene just like any other scene. Slick hair, tattoos, wife beaters, and slap bass. It doesn't make it any less valid of a technique, but cliches are what they are in every genre/scene.