I'm 6'4" 190lb, and I considered a 150 for my PPL. I sat in one once and was immediately "nope, I don't fit." Too tight, too difficult to keep my knees out of the way of the yoke. Ended up doing my PPL mostly in a Cherokee 160, with a few hours in 172s, and finally bought a Cherokee-235 (also based in Tucson and did my PPL at Ryan).