I am a member of several gaming wikis, from Mario to Halo (obviously). They all have they're ups and downs, but one of them stands out to me. Halopedia.
It may not have as many articles or pages, but it has way fewer stubs.Plus, no other wiki has a ranking system about how much you contribute. It inspires people to help out. The only flaw i've ever found in Halopedia was, a long time ago, ODST's were the featured article for around 9 months. I would log on every few days to see if it changed, but it didn't.
Then one day I saw it was different and I jumped for joy! (not literally, I'm not that big of a weenie.) And one more thing. I think that the admins do a good job keeping things clean around here.
Long live Halopedia!