Sin City 2: A Dame to Kill For

Sin City 2: A Dame to Kill For has a striking visual style, an engaging plot, and fun characters and cameos. 

I liked the first Sin City, although I haven't read any of the comics. I didn't remember much about it, so I read the Wikipedia article on it before watching this one. I didn't think it really helped; it was just a jumble of names - X did this, then Y did that, and I couldn't even keep the names straight while I was reading it. I think it actually was useful, though.

I love the visual style of the sequel. I wanted to see it at the theater, but it looks like it's not coming to the cheap one. It's amazing how much it looks like you're watching a live comic, and all the highlights and color pops were great. I liked the noir-style narration.

The Expendables

If you can work hard enough to get past all of the things that are wrong with Stallone, it's got some entertainment value. The scene with the guy and his machine gun in the hallway was particularly memorable, and I liked Rourke's performance, and of course Statham.

Iron Man 2

Stark's complete and utter lack of likeability rendered this movie pointless.