Personally I liked Tidus. I thought he was dumb to the extreme, like he'd been blitzed in the head ten too many times, but not annoying. i mean, sure he had a little Dad hatred stemming from a bit of an Oedipal complex, but at least he wasn't in need of large amounts of schizophrenia medications.

I think he was a well thought out character, and that his personality goes along well with his superstar role he was so used to in D. Zanarkand.