Watched Guardians of the Galaxy last night (free ticket via cinema's Facebook page, yeahboy) - I rather enjoyed it even though I have absolutely no idea who most of the characters/worlds/story arcs etc are due to not being a comicbook nerd hah.
The action was quite cool, but the highlight for me was the comedy, plenty of laugh out loud moments throughout. The Rocket/Groot pairing in particular is awesome. Big ups to Batista as well, had no idea his character would be as talkative as he was, and it was pretty funny as a result.
There is a post-credits scene as you'd expect, but it was more "uh, that was random" than "ooooooh that was cool".