* I want a boy, either a stallion or a gelding.
Not sure about where you are, but unless you have your own land, finding housing a stallion can be difficult and expensive. I always lean towards geldings, but its personal preference.
* I want a semi high-spirited horse.
I had one of those and although he was a lot of fun, i'd go for a quieter horse these days. Why do you want something that is high-spirited? And what is your definition of high-spirited? Not trying to cause issue's or sound nasty, im just curious is all.
* I don't want an easy-to-ride horse.
Having owned horses that weren't easy to ride I don't hold it in high esteem. I'd take a pliable horse that likes to work with you over an argumentative one any day.
I really think it comes down to seeing horses and finding one that is suitable for you. A horse that you buy may not be everything that you want, but that doesn't mean you cannot teach the horse your own style. That's what I do, and both horse and I love it that way.
Good luck with your search!!!!
My Number 1 Rule When Owning A Horse:
"HANG OUT WITH THEM AND BE THEIR BUDDY, THEN THEY'RE YOURS FOR LIFE"