when i play FFX i dont get the impression that tidus whines constantly *gets a stoning by tidus haters*
sure, he freaks out a bit in Luca when Auron tells him that nice tidbit about Sin, but considering that (SPOILER) Sin is his FATHER id say that he handled that pretty well. other than that, i dont remember him complaining all that much. maybe just clueless about a different world he was thrown into and forced to deal with.
like what Xander said, i wouldnt notice if Kimahri suddenly dropped off the face of Spira, preferrably off the giant chasm in the Calm Lands XD