I'll get flamed for this so...
Asbestos undies - check!
Titanic is a good movie IMHO. Disclaimer: since as long as I can remember, I've been fascinated by the Titanic (by the Hindenburg too but I digress...).
Before James Cameron made this movie, I had read and watched a lot about it, good (A Night to Rememeber by Walter Lord,...) and bad (Raise the Titanic by Clive Cussler,...). I remember when they discovered the wreck and bought the excellent book about its discovery by Ballard from the WHOI*.
When I heard that Hollywood was making a new movie about it, I thought 'Oh boy, this is gonna be awful'. I had respect for Cameron making sci-fi movies but I dreaded some kind of action-thriller loosely connected to the historical events. Then I heard that there would be a lot of romance and I thought 'this is gonna be BEYOND awful!'.
Well, I was wrong. The recreation of the ship, the depicting of the events, even the cast with actors looking a lot like the real people (Capt. Smith, Bruce Ismay, architect Andrews, Molly Brown,...) were way above my expectations. Even the romance part wasn't too bad.
Titanic is a movie that I enjoy rewatching from time to time. It has absolutely nothing in common with junk like Pearl Harbor or U-571.
There, I said it.
edit: that being said, the 3D version wasn't needed IMO, and I won't go watch it. But I guess that Hollywood couldn't let pass the centennial of the event without trying to make easy bucks from it.
* I highly recommend it to you. The same team also published a book about finding the Bismarck that every WWII interested people should have read at least once.