I'm a sucker for dapples, roans, any types of overo or sabino markings as well as appaloosa-type markings (I know that not all appys have them, but that's a simpler way of putting it
I love bays, too, since I ride a lot of them. I love A LOT of horse colours, especially the unusual ones, but most definitely not only them.
And a bit of a silly fact: My favourite horse is liver chestnut and although I actually don't
like chestnut horses, I absolutely love her because she has a unique blaze (well, maybe not unique, but it's different) and two blue eyes. She's gorgeous. And an amazing
ride, I love her to bits, even though she's not mine.