Well, I'm already in an RP with you, and most of these plots I've already done, or am in the process of doing...

Although I've avoided pirates unless you include space-pirates.

Only plot I can think of that doesn't immediatly take a detour for the worst, that I'm not already doing, would be a closet-werewolf seeking help curing their lycanthropy, so s/he becomes a wizard and uses their friend as a familiar (because that totally makes more sense than summoning an angry demon and asking THAT for help). And ofc there are side-effects of being a familiar, like the fact you're being used as a mana-battery.

[i]Could[/i] they fight crime? Maybe. But then they could also get captured by irish time-traveling pirates.