I know the strap/buckle gets a lot of love here on the forum but my hands just struggle with them for some reason. I'd actually rather tie a slipped buntline hitch on a line/strap suspension, cuz it's fun.
I went with whoopies early on and never looked back. Easily solved the "trees to close" problem several different ways which was also fun.
In the end, you will become comfortable with a system and that will be your "preferred."