The 'chosen family' theme would have been interesting had the film not been afraid to actually explore it.
Fast, fun, flashy. Some cool action sequences. Some hysterical pop culture references. Groot is adorable. And Rocket cracks me up for some inexplicable reason.
But this film begs us to take it seriously at times and because of its inability to explore its themes and insistence on using action movie cliches, it falls flat. And its problematic at times (i.e. almost every moment with Mantis -- yikes).