Posters with vertical designs have always been my favorite.
Jaws
Jaws 2
Jaws 2 (Style B)
Jaws 3
Mad Max
R.O.T.O.R. (Mad Max and Death Wish rip-off)
Conan the Barbarian
Tron
The Evil Dead
Excalibur
Legend
The Beastmaster
Dragonslayer
Return of the Jedi
Psycho (Remake)
From Hell
Leviathan
The Deep
National Lampoon's Vacation
National Lampoon's European Vacation