I don't like the first movie in the least. My points of contention, in addition to Martacus' gripes -
The 'raptors on the roof scene near the end of the book was left out of the movie. Geez, that was tense. It seemed to me that the theme of the book really stood out there - nature was taking over the place, and there wasn't a damn thing you could do about it, short of simply surviving. Sattler's utter desperation being the one thing that saved her as she made the leap to the pool. Muldoon backed into the drainpipe armed with a rocket launcher, hoping his hindquarters weren't exposed - classic.
Wu's conversation with Hammond was nixed. That would have been a great scene.
They killed Muldoon in the movie.
The casting was atrocious. Maybe the worst I've ever seen. Nedry was good, the kids were good...then it breaks down. Neill as Grant was passable - barely. Laura Dern was terrible, Goldblum laughable, the lawyer not even remotely the same character. Attenborough playing a lovable Grandpa instead of a cutthroat, complex businessman was a big mistake. The characters that were well cast had bit parts - Samuel L. Jackson, the guy who played Muldoon, Wu, Harding...the dinos were the clear stars.
The ending was pathetic. Come on...the Tyrannosaur coming to the rescue? Why on earth would a Tyrannosaur break through the wall to attack some 'raptors?!? Instead of them succeeding thanks to their wits(the brilliant egg scene), they are saved by some freak occurrance. I hate that.
Such potential for a great movie, and they totally dropped the ball.
And the Lost World isn't even worthy of discussion.