Man in the Iron Mask (1998 version) for me.
I also liked the Negotiator (1998 film). But it seems critics didn't.
I understand it has its share if problems: The Louis/Christine subplot didn't go anywhere, and majority of Porthos's scenes (until the final act that is) may as well have ended on the cutting floor. But other than that, I feel it was an enjoyable film that was reviewed way too harshly by critics. I thought the story of replacing the king by his twin genuinely intriguing, and so was the fact the not all Musketeteers agree with this plan. I found the ending to be particularly engaging and emotional. The actors who played the Musketeers did a damn fine job, and DiCaprio did a lot better than people give him credit for. The soundtrack for this film was amazing.
I also liked the Negotiator (1998 film). But it seems critics didn't.
All reviews I've read focus on the fact that it ripped off Die Hard. Now, the only thing the film has in common with Die Hard is a man taking hostages on a building. That's it. The storylines of both films are drastically different. I felt that the plot of Negotiator was engaging, and really wanted to find out who framed the main character (Samuel L Jackson). The reveal actually turned out to be alright. Nothing spectacular, but nothing Shiyamalan bad either. The biggest flaw for me is the ending: He's free of charges, and the actual villains are put to jail, and Samuel is free to go. The end. This doesn't make sense, considering he took hostages, which led to the death of a person. He'd still go to jail. But if you skip the ending, it's definitely worth at least once.