Sorry, not really an AIBU and inspired by the Pandora thread so breaking a few MN 'rules'. I found it really interesting to see what people view as tacky. Agreed with some and was surprised by others.
My personal pet hates are those baby on board signs in the back window of many cars (wouldn't mention it in real life as one of my best friends has one), rings that say things like 'Mum' on them and streaky blonde highlights in dark hair.
Completely appreciate that we all have and are entitled to different tastes. Just fascinated by the strong but opposing responses that an innocuous item can cause. The things I've just listed are viewed as useful/beautiful by many other people.