It is like asking if you like PC's or Tablets. Its really up to you. Best to weigh the pros' and Con's of each in your case.
Most bike racks and hitches will not accommodate the home built bicycles or Recumbents in general.
For me a hitch rack would my only option as I have a small car. For you looking for your truck. The bed is your Cargo area for camping gear maybe. Food of picnics and any other gear you may choose to carry. Also my Timberwolf build and Warrior builds would not fit on any commercial racks. So I would have to build my own rack. I may go with one Created by Spinner. But there have been several built hitch racks that would work nicely.