I'll vote for repeating a topic I enjoyed doing: "Home." I also liked another that in fact it was challenging, but instead of giving up I kept at it when I saw the great shots some people posted in the gallery. I'm talking about "Shadows."
Never did I perceive any of the monthly projects as a competition. In fact, the idea would never spring and last here. It's not that one winner would render losers, it simply happens that, instead of "beating" my pals, I'd rather learn from them. That's how I've seen the projects. Competition in the RFF? That's just not in our collective DNA.
But then, we're not afraid of it either. Then, it wouldn't be competition though... I've learned so much here that "competing" would be just another reason to hang out here. Granted, not everyone reacts to it the same, so it'll be healthier to stay away from the notion of competing, but not from shooting Shadows in February, or Home in October (for instance).
So, I've voted with my heart, based on the things I like, which are, of course, those I shoot.