Mares

Horsepeople know that geldings are so (so!) much easier than mares. They're sweeter, and gentler, and less bossy, and generally easier to get along with. But there's just something different--more--about a mare. She'll break your heart a million times and keep you coming back for more. She's not shy about how she feels at any given point in time. She'll give you everything she's got (when she wants to) and when she does, it's physically painful to know that that horse is so in tune with you.

Then she'll bite you in the ass and run away with the bit between her teeth. :)

These are two of my favorite mares.