I switched to Gunfighter about. two years ago and I agree. It takes a while to get the cadence down, and you really have to think differently than the others when doing a stage. Nevada Sweeps are a bit tricky, Progressive Sweeps are a real pain, and I love double tap sequences. I'm still not as fast at GF as I was in Cowboy. It is more fun though.
And if something goes wrong, it can really go wrong. I had a light primer strike during my last match, and cycling back around one-handed was incredibly slow and awkward for me, even with lowered hammers.
I fear if GF is allowed in any category, then the GF category will go away.