I like using a side quiver.
Some advantages are:
If you have your straps adjusted right, you can use you bow drawing hand to guide the quiver through brush and briers. It ain't up in the air catching on overhead stuff.
You can also grasp your arrows to keep them from rattling when hopping off a ledge, log, or stepping up onto something. Or when you're in a hurry getting to your stand.
Your arrows are where you can retrieve them without making a lot of movement. They're right at your side whether you're standing or sitting. You can swing your quiver around and across your back too, and still retrieve your arrows very well, if you get tired of wearing it at your side. Side quivers ain't hot on you during warm weather either.
I have only one complaint about side quivers. They're not real handy to wear in a treestand, and when you hang them on a branch your arrows ain't at hand. But that's a small complaint I can live with.
I've heard others complain that a side quiver "flags"........ meaning the position of the arrows cause the fletching to act as a flag, alerting game. Could be, but I believe if they're flagging, they're making too much movement.
The Raptor quiver that Ted Fry makes is a nice looking side quiver you should check out also, and he's one of the sponsors here.
hnh