I've flown the MAX-8 a few times. The engines are smoother and quieter, and as mentioned above, take a ton of time to start when warm. They seem to idle higher too - release the brakes and you'll slowly start to move.

Otherwise it's still a 737. The big screens are pretty, but there's not really any extra capability. Just more map display. I feel like it's a little heavier in pitch during landing, and had a CA say he thought it felt a lot like a 767 (I wouldn't know), but it's close enough to an NG that I don't think about it much.

It's nice not having an OFF position for the gear anymore, and they moved the handle far enough to break any tendency to blindly reach up and accidentally put the gear down during the climb.