Do not mistake them for cute, cuddly oversized teddy bears. We have one and it's pretty much a tornado trapped in an adorable little body. He is completely convinced that he's a giant stallion, even though he's a 27in gelding. He has a huge personality, and has an attitude towards everything. He's better than any weather forecaster, and will whinny to be let out when it's going to be good, and will stay so silent you would hardly believe he was in the stable when it's going to be raining. He only lets a select few people catch him, and no amount of treats/bribes changes that. It's very rare that he walks anywhere, and they are remarkably strong for their size and can drag you off. If he was any bigger, he'd be dangerous (but he's the same size as a large dog, so it's just cute), and he often takes a random fit of bucking, running and rearing. If you're scratching him, he will reorientate in order to ensure you're scratching the correct place.
On a serious note, watch their weight. They're very prone to laminitis and other weight related issues, and they're very easy to make fat. Restricted grazing is a must.