For me:

1. Family members or friends

Seriously, I won't shoot fawns or button bucks. No younger small racked bucks. One thing I definitely won't do, that I know some people have no problem with, is shoot does that have fawns with them. I just can't do it. Here in NW Ohio there are alot of does, and the past few seasons we have been blessed by the DNR to have a bonus tag to take an anterless deer before the slug season starts ( I won't get started on that). There are so many does running around that there are always does without fawns with them, so I have no reason to shoot one with fawns. Just my way of doing it.