I have a couple.

1. Bow accesories that are expensive, yet made out of a lot of plastic.
2. Backpack straps that come with most the stands. They are most of the time junk and I always replace them.
3. Noisy backpacks. I hate packs that have noisy zippers, or the overall construction is horrendously noisy. Thats why I use Badlands packs.