I admire Lightning, I believe she is great so far, nothing wrong with a bitterish character. You people forget, she is Cloud reincarnate and maybe because we have not seen FF7 in a PS3 cutscene we tend to disregard how much of a bummer Cloud was to Barrett and Avalanche in the first few hours of the game, arrogant, rude and tried to act bad-ass for the role.
Lightning is just as rude and loose and every time she is using that lightning ability to fly around I am aware that she deems she's a badass too, she probably is the best Final Fantasy lead character since Squall, Zack, and Cloud.
Tidus was the evilest hands down. He complained and PMS'd for what? 90% of the game? The only time he was great was when he and Yuna had their moment.