What is a stallion horse's personality?

Not to say... Is depending on the breed and training.

^^ Is right. But from my experiences, most stallions get quite excited when around mares, and can be very hard to handle. But, I know one stallion that would kill to get to a mare, and another that would be very excitable, cbut could be ridden with mares, so, it just depends, although an excitable attitude usually occurs frequently.