Personally, I always try to play characters that offer me interesting role-playing options.
In one campaign I played what I called a 'Paladin of Nethys' (Actually just a Hexcrafter/Spellblade Magus who took Arcane Edge to explain how he smote evil) who was determined to scour all of Golarion, starting with the Riverlands, for anyone misusing magic. He died fairly quickly, but I managed to avoid falling.
Then I played Gundar Thundertongue, a member of the Witch Wardens who took the 'People of the North' Playing Companion trait that allows you to be of two different cultures. Gundar was part Shoanti Part Ulfen and he looked a bit like a surfer. He spoke very loudly and tended to spend most of his money at various pubs, buying everyone drinks by throwing around his share of loot.
Then I played as Jannis Overburn III, a magical taxonomist who believed that magic was simply an entirely incomprehensible eco-system with each spell being a different species. She died during close-up examination of a fireball.