Those tri-counts are acceptable, but I think you could shave a number of tries off your calves, forearms, and helmet. Also off the feet. It kind of looks like you down-rezed your high poly for those parts and you could cut a lot of loops from them and still maintain shape.
Very nice bake man! Very clean only see a few things that look off, but they are minor. Personally id add an extra edge loop on the shoulder pads on the top to round them out a bit more. Shouldn't add very many polys and will hide the polycount better. Also you might as well bake out the spec and diffuse from the hipoly…