Lawl @ Froot Loop. Nice name. I vote Greek stuff, just 'cause you can modernize it and do whatever you want. I was my own version of Harley Quinn one year, and my ex was Joker.
WLB, I will definitely be interested in seeing what you guys decide on! Phineus and Ferb, while I know little about it, sounds fun. I'll PM you with my REAL NAME OH NOES. Though you can probably find it through my blog anyway heh.