I pre-ordered the 9 Pro
Having skipped a couple of generations as a very happy (none-pro) 6 user, the 9 crosses the line for me with its improved camera features, the main one being that 50 megapixels can now mean exactly that. The 6 can already just about replace a real camera if I must travel light, while the 9 Pro makes travelling lighter more appealing.
The AI features? I'm all for the ones I don't see (I'm all about the photography, and if an NPU makes that better, I'm fine with that), but the flashy, visible stuff leaves me nonplussed (though I'll doubtless find uses for some of it).