What is your favourite conversion / converted 3D movie?

[NMJack]

Based upon the answers so far, I think some are interpreting the question as refering to the quality of the conversion process and others are answering with respect to how well they like the movie itself. As far as the quality of the conversion is concerned, I think Titanic is the best I've seen. MIB III is also really good, likely because of the amount of natively rendered 3D CGI that is really "true" 3D to begin with. That said, I'm joining the chorus with a big thumbs down to all conversions versus "real" 3D. I sometimes enjoy a conversion or two, but then when I watch something in real 3D I really notice the difference.