I find that when I hunt from the ground I enjoy the whole experience much more. I'm not hassling with tree stands, steps, safety harnesses and such. I just get to where I'm headed and bam, I'm hunting. If the wind changes, no big deal. I just stand up, walk a few steps, and I'm back to hunting again.
Hard to explain, but to me it just seems more natural. I am in no way against tree stands. I still hunt from them, but if given a choice and all things being equal, I'll choose the ground.