Okay, okay, I know this sounds SO immature, but I am seriously curious. I have had my gelding for 10 years now (since he was just a wee one). Over the years, we have had a few horses, and he's been around a number of other horses with some regularity....He generally doesn't like other horses, he isn't aggressive, just has kind of a "grumpy old man" attitude.
Since I have had him though, there have been three horses that he has been absolutely enamored with. First, it was my friends appendix gelding (who passed), then it was my QH gelding (who also passed), NOW it is my new Hanoverian gelding....All three have a few things in common; they are a little bit older, are over 15.2hh, and are dark bays. He seriously has a type, and does this super marish whinny at them, and will follow them everywhere (past tense for the dead ones)....I think it is hilarious and adorable, especially because he is a small (14.2h), plump morab.