I am in Illinois and live one hour away from the city of Chicago. The anime convention held around there are Anime ZAP in January, Con+Alt+Delete in December, Anime Central in May, Anime Midwest in June, and Anime Magic in August. I go to every one of these conventions every year save Anime ZAP because that one is the furthest away being two hours away. Anime Central is definitely the largest convention out of the ones I have listed. I am telling you that it is massive all in in convention center size, number of attendees, etc.). I think my favorite convention to attend is Con+Alt+Delete because it takes place in the winter season and I just love colder temperatures.