Oh and FYI a Friesian was long listed for the USA Olympic Dressage Team last year. ;)
and you should try telling this boy Friesian's can't compete to high levels
http://ambassadorfriesians.com/Roark.html
Oh dear after reading this thread there are so many people with opinions based on very little knowledge.
Anyways in answer to your original question.
If you want a bighearted, honest, stunning, loyal horse, full of character go for Friesian.
If you want a challange and can be bothered to...