I saw Wreck-It Ralph recently...twice. The first time I saw it, the only thing I could really say about it after it was over was, "Oh my Nintendo, this movie was the best thing." The plot was so good. The characters were so good. Even the short at the beginning was so good. I laughed, I almost cried, the ending made me happy. I loved the way that everything was tied together. Disney did a really good job with making sure there were no awkward plot holes or anything.
The second time I saw it, I got to see all of the amazing details I missed the first time. I noticed a lot of characters from other video games in this movie. I still laughed at the same funny bits, I still almost cried at that part when... well... that thing happened. I really don't want to spoil it for anyone.
My recommendation would be to just go see it. It is the type of movie that you can really watch with anyone. I saw it with my dad once and with my friend the other time. It was a fabulous movie.
