I legitimately don't want an AR-15 solely because as a gun they are aesthetically ugly as sin looking. My taste in firearms is thus thoroughly girly and artsy, I want them to have a certain classic design style. This is why I prefer Bolt Action Rifle's or Lever Action, and I don't really like the stark unartistic modern look of these rifles.
It could be that in my mind I prefer something that looks visually how my mind imagines guns looked in WW1 or something.