So, I'm about to rant a bit here.
What? I understand that people all have different tastes, but how was Yuna the worst? Being a summoner in FFX was more than just being of a bloodline, it was hard work and determination. Not only that, but you were a martyr, giving up your life so that there may be a short period of peace. But even that was uncertain. Yuna and her gaurdians actually changed the whole cycle of death and sorrow, but still lost so much along the way. No matter what, she wanted to protect her people.
Rydia, Eiko, and Garnet were all born into power, Yuna had to earn it herself.
Anyways, I voted for Summoner. I've always love the Mage jobs throughout the games, and FFX is what made me fall in love with the Summoner job.