For my theif/warrior I'd say zoom on the bow is my favorite. The least I like is recovering twice as many arrows from body's. I wish it was little better, maybe if you found twice as many arrows or every time you bought them you get an extra arrows for every single arrow you bought.
I know this question is a little broad but try to think of your absolute favorite, one you couldn't play without. Then try to think of one that you hated choosing but had to because you needed the perk after it. Remember this is just for your build. If you played more than a few characters then make it for your most current.
I'm jus curious to hear what perks people love and hate while playing Skyrim.


