I loved it. The musical score is on my iPod, my text message notification is The Rocky Road to Dublin (the song in the video), and I am genuinely looking forward to the sequel, which comes out on December 16th.
I may, or may not, like the movie based solely upon the leading actor, Robert Downey, Jr. The jury's still out, but I might have been the only one that saw Iron Man 2 in the theater, and Robert Downey, Jr. seems to be the common denominator.
Before you write me off for good, I swear my motives are purely innocent, Watson. This is just cool.