negative1 said:
terminator 2 - the first is an original, but once again in the 2nd , it made the terminator into a wimp, and ruined the

importance of his actions from the first one

evil dead 2 - good horror the first time around, just corny the second

In most of the entries on your list, the originals weren't even that good to begin with (Species, Bad Boys, etc. ) but these two stuck out to me. To me, Terminator 2 improved on the original (practically a b-movie that somehow got popular) in pretty much every aspect.

As far as Evil Dead goes, the first one was pretty tongue-in-cheek with its approach to horror anyway, and the second one stuck some comedy in it without losing all of the horror (unlike Army of Darkness, where they just went all-out comedy). I'd actually go so far as to say that Evil Dead 2 is my favorite horror movie of all time (and I've seen quite a few).