My list:
a) The Brady Bunch Movie: Proof positive that movies based on TV Shows don't always work. I remember going to see this with my gf at the time and I wound up chewing her out afterward.
b) Speed 2: Cruise Control: Sorry, but the first one was much better and held my attention.
c) Blues Brothers 2000: Please tell me why they desecrated one of the greatest movies filmed in Chicago?
d) The Fintstones: Proof positive that a movie based on a cartoon doesn't always work.
e) You've Got Mail: I went with a date to see it and wound up doing this: zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
f) Deep Impact: All the good scenes were at the end of the movie.
That's all I can think of for the moment