Barn Doors ALL THE WAY!!!!!!!!!!!!!!!!!
I am on my second burb. First was an 86 w/barn doors, I still regret selling that thing. Current is an 85 with tailgate.
I have seriously considered buying another barn door burb just for the body, and swapping the whole body out on mine. THAT is how much I hate the tailgate. I have completely rebuilt the entire inner workings and it still does not work right, if at all. I disassemble and reassemble it at least once every two weeks or so, just to get it working again.
I bought it thinking I could swap for the barn doors, only to discover that is not really an option on models later than '80. So now I am going to convert the rear window to manual. But like others have said, access to the gear in the back is an issue too. Mine has a 4" lift on 35" tires. I am 6'3" and have to hop up onto the tailgate, then crawl in. I built a drawer system in the back now, and that makes accessing gear much easier, but I still wish I had the barn doors. If I ever buy another, it WILL have the barn doors, no exceptions!