There are quite a few categories, so be sure to look them over and pick the most fitting. So if you have an idea about avatars, you'd post it to the avatar section for example.
Avoid lumping multiple ideas together, as there is a voting system where you and fellow players can vote for the ideas you like best. If the one post has ideas going in different directions "I'd like this, and that, and this thing too" its not easy to put a vote toward it as its to complicated.
So a good example would be:
a bad example would be:Big Foot avatar
"I'd love to have a Bigfoot avatar, you know like that one from Harry and the Henderson. It would be funny if he had some flies as an optional layer, tee he he"
While the second example might have some fun ideas, they need to be one idea per, well Idea:)avatars
I want the following avatars... shaggy dog, dill pickle (with pickle juice background) and a coffee cup avatar. Oh and how about an exploding hot dog environment!"
So go check it out, and lets see how well it works out for all of us.