Well, I am just training my first horse from the ground up right now. He is 10 weeks old. (See Zane in my "Horses" section).
Previously I have just purchased "trained" horses and worked with them through whatever issues they had, and tried not to create more issues, lol! Most of my trail horses have not known how to side-pass, so I taught them that, and some of them have been barn sour and in a hurry to get home, so I have/had been working with that. Or wouldn't stand still when you mount, little things that are annoying but not major problems.
But my first foal was born July 14th, and he is almost 10 weeks old now and I can hardly keep my mitts off him! I'm having so much fun training him! He leads, ties, moves off of pressure, ponies, picks up his feet, deworms, can be touched all-over, is easy to catch and loves to be groomed. He isn't perfect with some things, such as sometimes he lags or nips when leading, or won't hold his feet for more than a few seconds, but hey, we're working on it!
I always dreamed of having a foal, but it's even more fun than I imagined!
Sure, we've hit some snags (like not wanting to pony, rearing and/or throwing himself down during the early halter-breaking stage, etc.) but basically we are steadily moving in the right direction and I am very happy with where he is at. And did I mention I did imprinting with him too? My horsie neighbor says that with me the little guy never stood a chance, lol! I was working with him from the moment he was born.
I know there will be challenges ahead of me too, but so far raising my own foal has been everything I hoped it would be! (Minus the health problems he had the first couple of weeks, but that's another long story! My neighbor says next time save the stress and get a weanling!)