There are a few liveries that are designed by artistically-clueless people:
WN--their new livery looks just downright horrid
Talk about serious color clash!
BD--the new bmi
livery has all kinds of weird lines, and just looks too busy
for my own good taste.
TUI (Britannia, Hapag Lloyd)--the new livery has a weird color and the tail logo really makes me scratch my head.