Fitness. I'm loving your recent posts, and I think you can tell I'm more than a little excited to share my experiences. Reddit had such an active fitness community—I especially liked the bodyweightfitness sub—and I've really missed those interactions. Fitness shouldn't be a solitary journey, and online communities have a lot to add to it. I think that some of the more scientific articles from /r/AdvancedFitness would fit in well here.
That's something I'd support. If you're getting from a neutral or even negative physical condition to something more desirable, be it running or bodybuilding, there has to be a support network, and Hubski is better suited for such than any other community out there. Here, people care about each other - and it is this care that they might turn into a positive momentum for one person or another. It's not to say that people have to cheer those doing their exercise, but it will never hurt.