Pacific Rim.
By far my favorite summer blockbuster this summer. I love Del Toro and his creature designs and all his team's creativity just shines like a motherfucker in this movie. Like others have mentioned, including my friends, the plot was nothing special. It wasn't bad, just a B-movie plot hidden in a very high budget film [like Michael Bay films] only Del Toro has a charm Bay doesn't.
If there is one movie I recommend watching in 3D bigscreen/Imax alongside a D-Box if your theater has any it is this. The shaking of the chairs and the bass adds so much to the experience.
What can I say about the action? Wow. It was amazing. Del Toro you dog you.
As to the casting, for me it was perfect. Idris Elba didn't do much for me but his character itself wasn't the most interesting part of the movie. Charlie Day and his scenes absolutely stole it for me. It was Charlie Day playing a smart guy so seeing his exact same voices from Phillie is hilarious I love the guy. Charlie Hunnam did his role as the movie's badass and I think his voice his like really smooth butter, so I'm hoping he gets puts in more movies as I love his acting. Asian chick was fantastic too and I'm sure feminists will be thrilled as Del Toro didn't make her into a princess needing to be rescued or a prize. Ron Perlman was also fantastic.
If you're gonna watch the movie don't watch it because you want an original plot. Go watch it because of the art/creature/costume design, the acting and cast, the cool battles and the experience.