I'm too new to soaping to have developed many pet peeves (but just wait...), but I can say that after researching soap and ingredients for all things BB for 2 years, my biggest pet peeve by FAR is improper and/or misleading labeling. I'm no expert on the legalities of labeling, but I do know the basics and it amazes me how many companies either do not know or choose not to follow labeling laws. Shifty, shifty, shifty...