Marvel's Guardians of the Galaxy is a superhero movie for people who don't want to be or rarely feel like superheroes. Some of you may not want a merry band of misfits (including a tree and a raccoon) guarding the galaxy, but give Star-Lord, Gamora, Drax, Groot, and Rocket a chance. They might surprise you with their skills, and they'll definitely give you a few laughs along the way.
I for one was entertained the whole way through Guardians of the Galaxy, even if I can't really give a good summary as to what the plot was. It involves an ancient relic with a lot of power, a few evil people who want it, and the good guys protecting it without really knowing what it does, but don't expect an explanation for all the intergalactic locations this movie is set in, or a detailed history of how Star Lord/Peter Quill adapts to his life off Earth. You just have to enjoy the story for what it is and what it gives you.
Even if it's not your thing, the soundtrack is pretty sweet.