My favorite PC of all time was Logue the Barbarian.
Logue was an ill mannered brute with a low intellect, but a heart of gold. He was also deeply superstitious, and afraid of magic and heights (to his great shame). He really liked to drink, arm wrestle, and tell fantastic stories around the campfire that were completely ridiculous.
Some memorable moments:
Logue steps on a pressure plate and accidentally activates a trap, then steps on it again to make sure.
Logue convinces his party to paint their faces, and get drunk, and then dance around a fire to summon the Great Bear, so they can ask his deity for guidance. Much to the shock of everyone, the Great Bear then actually appeared in the bonfire, and spoke to the party. This was the first and only time in the campaign that a deity had actually physically appeared. They never doubted Logue's beliefs after that.
The party helps Logue conquer his crippling fear of heights, and helps him regain the respect of his clan. He is able to complete the quest that all members of his clan must complete at the age of 18, by climbing a mountain and confronting the bear in his cave. He originally failed this task in his youth, ironically due to being afraid to climb the mountain, and was banished from the clan out of shame. Logue now confronted the bear, and they talked, and arm wrestled. The bear was really quite nice.
Logue tells his party the legend of the giant monster Loc Nar, who will swallow the world, and bring about the end times. Everyone thinks this is absurd. The party would later confront Loc Nar, who really wasn't such a bad guy. Loc Nar was an ancient being trying to warn the natives of an impending doom, but they misunderstood him. And thus the legend spread among the many tribes, in which he was the villain.
The party almost meets its end when fighting an undead dragon. With Logue pretty much being the last man standing, he decides that it would be an honor to die in glorious battle while defending his friends. He throws down all his armor, and charges at the dragon in the nude. He hits the dragon, and it dies.
Logue must defeat his double, to fix the timeline, and stop a cataclysmic paradox that threatens to destroy their reality. While some of the party members fight their double, Logue and other Logue agree to have a fair arm wrestling match. The original Logue wins, and the duplicate Logue graciously accepts his defeat.