'Tool' watches
Oversize cases
NATO straps
PVD finishes
Crown guards a la Panerai
Tapered bracelets
Most chrono dials
Gold
Odd shaped cases
Minimalist dials
Busy dials
Long hands
Faux vintage dials or bezel inserts
Bling
Overly shiny cases
Anything but bracelets or decent leather on a diver
Probably lots more besides.