You put a lot of restrictions and cons to both choices which is why I chose neither. If I were to be a pony, I would only do it if that meant our Earth became something like Equestria (so everybody became a pony) and the problems we have now would disappear. If I were to have a pony companion.. well I'd sure feel sorry that she can't be with her kind even if she has no regrets being away from home. Seems like a My Little Dashie problem.