I mean things like, even if your fiance, family members, etc., wanted them, you just wouldn't do? Did your fiance?
For me, the non-negotiables were no garter/bouquet toss and nothing resembling a dollar dance (eta - and NO showers even though we keep getting pressure about it from his family and NO registry even though we keep getting pressure about it). For my fiance, nothing cheesily romantic (or what he considers cheesy) like heart-shaped candle holders or the like.