This is definitely interesting! Some of my favorite colors (black bay, silver and pintaloosa) have been listed as strong dislikes and others I'm not fond of have been at the top of people's lists. Hmm....
My least favorite color to have around, breeding or otherwise, would be a red roan. They can be pretty in Welshes and such but in minis I haven't seen one I liked yet and they clip out AWFUL colors. Like a chestnut but worse as they turn pink!
Ugh. Second would be a really orangy chestnut with no markings as to me that is just not an attractive color. A copper chestnut or liver chestnut or one with a lot of color variation in its coat is fine for me as a non-breeding animal but I'd prefer something with a little more genetic possibility when breeding.
I like greys as long as the base color wasn't something stunning, then it's just sad to watch it fade!
I hate the look of double creme dilutes but like others here, would have one for breeding as they produce outstanding colors I
do like such as buckskin.
Not a big fan of palomino in minis however as it clips out so light. LOVE it in big horses!
Things I'd love to have in a breeding program are white markings on any base color, deep dark bays with red (not mealy) highlights, dun anything, buckskins, silver dapples with white socks, appies and pintos for producing pintaloosas, blue or bay roans...anything eye-catching and stunning! I love the rainbow of colors possible with our little guys and the crazy colors like smoky silver black are my favorites. OBVIOUSLY, as everyone else said, conformation/temperament/movement all come first, but in a perfect world....
I'd just leave the solid red horses out of my program for the most part as I'm going to get quite enough solid chestnuts breeding from the darker, more patterned horses. Why up my chances?
Leia
P.S.- The single biggest lesson I'm taking from this thread is that no matter what color your foal is, there's probably someone out there who likes it!