Here's one I'm very tentative to pitch mostly because it's a world I created with my friend and a lot of characters in the world are his. That among other things since it's so many genres, it's urban fantasy, some biopunk (genetic augmentation is a VERY common thread in how humanity now works), some romance, some mild-post apoc (though it's only from the magical races mindset) and far more relationship based than combat based. It also has no standard fantasy races, except gnomes who are cool.

The main story is that it takes place AFTER the story that I wrote. It's a modern setting (story was late middle ages almost renaissance). Magic as in spell slinging and how it's executed is dead however they're TONS of magical weaponry in this world since the magic is still alive just under another disguise. It's basically what if Harry Potter actually trained kids in the art of combat (which is something I can get why they didn't but I still thought the fact wizards are pathetic WITHOUT their wands is lame and flawed but that's besides the point). Magic is openly discussed and they are two schools one's evil and one's good. The schools are based on how they make a relationship with said weapons they wield (which are usually sentient but not always). The good school focuses on mutualism or commensalism while the evil school focuses on basically parasitism and if you've read any Michael Moorcock Elric books you'll know what that means. Swords that are truly evil and while VERY powerful will suddenly stop working because well, they're full or want to mess with you. A sword will turn around and decapitate your girlfriend and such. 

The players would at times have to think about not only their player but also their relationship with their weapon. Is the weapon attracted to the wielder in some way? Does it demand things or just want someone to talk to?

I have A LOT of stuff ready for this RP I just have no idea if anybody will be willing to undertake this, plus this would need a co-GM.