I haven't been actively working with BSF for a while so I left off with corn. I know others have had good results using it, the most important thing being that it's had long enough to ferment. That's what I like about using corn is that it doesn't get funky too quickly and therefore it doesn't seem to attract as many fruit flies and other undesirables.
Traditional compost is a great attractant, assuming a certain amount of table scraps are involved.
BSF seem to like the smell of fermenting food in general. If it's got a strong odor but isn't too offensive to humans that's a plus.
