Shari I agree... Every horse is an individual. I have had some so smart that you think there is a reincarnated human in there somewhere... and I have had some not so smart or for a better word... less trainable. Regardless of size or breed, however I do see trends in some that are related to breed and personality that is breed related just like dogs.
Appy horses for example, mini or large can be quite the character... Smart and often too smart. LOL. When my vet knew I had gotten an appy for a riding horse I remember his saying this .. "know why the native americans rode appy horses into battle?"... so they would be good and mad when they got there....
That did not prove to be true. My appys have been my favorite smart quirky and a breed apart, but for some, what my vet said could prove true.
Those shetlands in my past, were smart and willing but I remember a few that made a monkey out of everybody.
For Morgans.... I have heard of their smartness, their stamina and trainability, but have heard folks say.."if a morgan wants to give you a hard time, they have the strength to keep it up all day".
Anyway... my point is that each person has a temperament and style that is different... and each horse has the same. There are horses that perform better for different individuals too. For somebody that might not like a certain horse, I would say it is probably just because the temperaments have clashed. Therefore I do believe that the horse that works for one individual does not necessarily work for a different individual. One should look hard and close at each horse as an individual and be honest in evaluating your own personality and see if it is a good match. My trainer can make my one driving mini look like a champ... On occasion that same mini can make me look like a complete rookie when driving, but he gives me kisses and follows me like a dog and he is incredibly smart and he waits for my rookie hands to make one error and bam... takes advantage of me.
Then I see horses that make the most rookie novice look like a million bucks because they are forgiving of error and style.
me... before I got hurt, I choose horses with drive and determination and spirit and was not afraid to rise to the challenge of any size or breed of horse.
As I aged and got hurt and have boo boos, I prefer the horse that can "canter all day in the shade of one tree" ... LOL. Forgiving, easy, sweet... regardless of size or breed.
It is the same for dogs for me too... I used to only own Dobermans.. I was a Doberman snob or so to speak... now instead of choosing specific breeds of dogs, I choose any breed, but rather pick the dog as a unique individual rather than by breed alone.
rambling... cheers folks. good topic