I have no real memory of M:I.
I like M:I 2 a great deal, but everyone else seems to hate it and the birds. I love the style, Tom's hair and the music. In fact, it was the first time I actually took notice of a score and ever since I've loved Hans Zimmer.
We don't talk about M:I 3 despite the fact that it had Jonathan Rhys-Meyers.
When I first saw the trailer for M:I 4 I was kinda ... naaah, it looks okay, but really ... M:I 3 was such a disappointment I didn't want to risk it again. However, I really like going to the movies and watch well-done action movies, the new movie has Simon Pegg and then ... it also has Jeremy Renner. I had no idea who Jeremy was before Thor and tumblr. People seem to like him a great deal, and since I'm really looking forward to Avengers and he's in it, I thought "What the heck. I have to check him out."
Ooooh, I'm so glad I did it! I didn't expect much from this movie, but it was SO MUCH FUN. Poor easyleinchen had to suffer through my squeals of delight and barely suppressed declarations of love for everyone on screen.
Tom is actually a team player in this movie. The team has characters and I grew to like each and everyone of them, not like in the movie we don't talk about. And they gave them issues. Everyone who knows me knows that I love issues when my favorite character has them. And they had well choreographed fights, which I'm also a fan of -- like, big time! Jeremy and Tom could really have gone another round at each other. That was so much fun to watch. Nevermind that it made me go all rrrrrrrrr. The locations were as beautiful as ever, but what really stood out this time was the humor. Twice they made fun of Tom's height or lack of thereof, and in general the characters didn't miss the chance to deliver a joke or two without it ever feeling odd.
In conclusion: If you want to see a fun and entertaining action movie during the holidays, this one is it.