So me and my friends have been wanting to cosplay up and go to an Anime Con. Does anyone know some of the really really fun and popular ones? I know that ComicCon is for comics, and basically everything nerdy including anime stuff, but anything else?
Without any knowledge of what your whereabouts are your best chance of finding anime conventions would be by checking out lists like this Do note they do not list all conventions. They only cover the conventions that are broadly known and announced through magazines TV ads and such.
Another source for you to find conventions would be directly asking a shop employee at your local manga/anime reseller. They tend to receive notifications of local events to draw more attention/public to it.