If you want something really well tested, there’s this game called Draw Steel that just came out… 😛

Kidding of course, that doesn’t seem like your bag. But I agree with other commenters that novelty isn’t the only thing to seek out. You could even argue that novelty-seeking is one of the things that drives the increasing spectacle-focused kickstarter bonanza.

You could potentially try to channel the novelty-seeking into other arenas than rules: new worlds, new formats, new roles (playing vs. gm-ing)?