I already mentioned it on your other thread, but I'm not above a shameless re-post. In summary:
1. Very accurate
2. Zero Recoil
3. Quick Follow-up shot for multiple coyotes, or running coyotes.
4. Adaptable - can be set up for plinking, target shooting, varmint control, predator hunting, and they're even being chambered in some deer and hog appropriate cartridges nowadays.

That being said, I respect everyone's right to like or dislike AR's for any reason. I'm not gonna tell anyone they need one or have to have one. There are a lot of rifles out there. A lot of them can do almost anything an AR can do. Those are just MY reasons for liking AR's.