I'm happy to play anything, but here's some things I think would be fun in no particular order:
-Something we rarely, if ever do, is work with templates (all vampire or lycanthrope campaign would be fun)
-GOLK campaign where we're all agents of the GOLK trying to eliminate knowledge of certain events that our previous characters have caused in the past (not sure how that would work, but would be interesting)
-All Collector campaign to spread the good word of commerce (Bards, Clerics, Crafters, Evangelists, etc.)
-Travelling circus act (the possibilities are endless)
-If we're to do a campaign based on one race, I'd like to see an all Taffer group. How fun would it be to be a group of bad ass squirrels?
-New concept here, but perhaps an elimination campaign? What I mean is we could all be individuals fighting for our lives, such as slaves or gladiators. Each week, we face ways to survive as we're pitted against new, more powerful opponents. If we survive, we're "rewarded" with new weapons, armor, gear etc. until one of us dies. If that happens, the dead can play as pit masters or NPC's vs. the living. Basically a real life survival horror campaign. The survivors earn their freedom and can be used in future campaigns.