Boards and Nails
Writer's Village offers a character building workshop which gives you a number of tests to determine your character's archetype. It also implies some Myers-Briggs (or at least Kiersey Temperment Sorter) scores, and some fun corresponding character disorders.
You have to keep track of your score if you go through the tests. (Test number three is fairly long: 210 questions.) I didn't think I found the tests accurate in Damascus' case: she turned out to be either a Wizard or a Defender. I think somehow she ended up more introverted/organized than I picture her.
Still, it's a fun little tool and it might provide some fodder for character tinkering.