Can someone please explain to me the chestnut hate?

I have to say I have apparently have a soft spot for chestnut/sorrels with star/strip/snip… The 2 horses I have at the moment have almost identical markings and I didn’t realize it until I saw them next to each other (after over 2 years of ownership; in my defense they weren’t kept in the same pasture or even on the same farm until last summer). First horse was a chestnut mare. Current horses are a chestnut tb/trakehner mare and a sorrel qh gelding, aside from their color and markings they are complete opposites with a 6” height difference…

Broodmare/retired eventer
http://i1230.photobucket.com/albums/ee499/mstout2/tango7.jpeg

cute qh reining pony
http://i1230.photobucket.com/albums/ee499/mstout2/bob18.jpeg

http://i1230.photobucket.com/albums/ee499/mstout2/063.jpg