I've always found that bean flours have a distinct bean flavor. Now, I never met a chickpea preparation I didn't like, and favas are close behind. But if someone doesn't like beans, they won't like bean flour crackers.

I know there are people who are really into food analogues - whether they're wheat analogues for people who can't tolerate wheat, or meat/dairy analogues for vegetarians. But I see all that as part of our processed-food, fast-food culture. If you just fix real food, everyone's happy. If you don't fix any bread, then no one has to worry about whether fake bread tastes like real bread.