Preference is all yours, but I can tell you that the barn doors have a tendency to rust out more easily than the tailgate units on the older generations so check out the door bottoms carefully! My 98 C2500 TV had the tailgate/glass hatch and my current 04 Yukon XL 2500 has the upswing hatch with separately opening glass. Either configuration permits access into the cargo area while hitched because the glass could always be opened, but often the trailer tongue jack keeps you from opening the tailgate or full hatch or the barn doors (had those too).