Honestly the entire community, and I use that word in its original context. After all, we aren't just faceless everybodys doing the cool thing at the moment, we are each our own individual person and provide our input into a larger group for the benefit of both ourselves and others. In addition we aren't strictly a Roleplaying site, given that our main emphasis is roleplaying, we still don't say you must roleplay or you're kicked.
The biggest contributor to the community has to be the staff and all their ongoing projects that help keep Iwaku lively. Without them it would be like living in a city without a city council. They keep everything running smoothly and don't say our decision is the right one. They want everyone's input to bettter the community as a whole rather than trying new things because they think it is cool. Plus, the staff isn't a holy position that nobody else can get in on. They rotate with members who have been consistently active and doing an outstanding job as part of the people.
Overall the site has an excellent well dedicated staff, a neat, organized, easy to understand forum system that doesn't judge people by what they don't do but what they do do, and finally a community composed of individuals and not mindless follow-the-leader types.
[align=center]THANK YOU EVERYONE!!![/align]