Honda by far; learned how to ride (and where not to go) on a 1984 TRX250, and have a 1995 TRX300FW and a 2017 Rubicon. Dead nuts reliable, easy to wrench on, and they always just start and work. I wouldn't mind Honda joining this century and putting a big twin-cylinder into the new Rubicon, though, as long as they stick with the mechanical transmission and don't ruin it by going to a CVT.
Most of the guys we hunt with have switched over to SxS, but they're too big (and expensive) for me. One guy bought a new Cam Am Defender and it was a quiet fart away from $50k delivered. We've had to pull a few of the 4-seater Polaris school bus...eh...Rangers out of mud holes because they're just too long and low to run logging trails in WV.