My sister's horse is a Lipizzaner x Arab, although I rode him first for six months until I got my new horse and she had a last summer showing her old horse.
The Bad: He used to be very nappy and VERY spooky, both have calmed down now, but he is still the first horse to jump out his skin at a noise or spook at a scary looking filler, and whilst he now hacks out alone without going vertical he still isn't happy on his own, although this is no issue for my sister as it was for me as she always hacks in company. He does tend to react when he's panicked by rearing, although again has lessened with lots of riding and training.
The Good: He has very big, smooth and generally dressage FAB paces, and a very scopey jump. He has a nice soft mouth and looks stunning going in an outline. Nice and solid to sit on, gets some high speed when out hacking and can go for miles, is fab for cross country. Nice nature, easily fits in with any field of horses. Very willing to please.
Personally, I didn't get on with him, hence why my sister ended up on him, but she absolutely adores him. I didn't like his little habit of going vertical, and didn't like that, when he was still green, he would throw his head in the air with the slightest contact. My sister isn't into dressage like I am, so she didn't bother trying to correct the head throwing and ask for outline, and it actually came right on its on as she did lots of jumping with him which he loved and he relaxed to the contact. Looking good now, and now he's a settled horse I actually do enjoy riding him again - but when he was green we didn't get on at all!
My sis on him at a show last summer. Screen Shot 2011-09-26 at 20.00.59.jpg