I like a back quiver. I hunt from the ground almost exclusively now, but I used them when I hunted a lot from tree stands too.
To be honest, I started using them when I was younger because I liked the way they looked, and my heros used them. I've tried other styles over the years, but I haven't found anything I like as well.
In thick brush I let it slide down along my side some, so my arrows are pointing more to the rear, and it slides right through with no hang ups.
I've used a Vista back quiver for the past 21 years. It has a good sized zippered pocket on the back that carries a lot of stuff that would end up in my pockets otherwise.
Bob