First (of course) bad ones, American version of  dreadful "Breathless", "12 monkeys" (original-"La Jetee"), "Sorcerer" (Wage of fear) and maybe more when I come up with them. I can't  think of  impressive remakes but I give a credit to some spaghetti westerns with Eastwood  (some were based on Kurosawa films).
Does anyone waste time on watching bad remakes?