I like half doors for trail riding. They give a nice arm rest and give the legs something to press against to hold yourself in.
I keep hard doors for the daily driving aspect, but since I no longer DD it, I picked up some ugly factory half doors, sanded and painted them myself to "match". They turned out decently, but I ended up selling them when I lived at an apartment because I didn't have room.
I recently picked up some white half doors, and if I can't trade for black, I will sand and paint to "match" again.