*whispers* I actually thought Guardians was the tamest MCU offering of the ones I've seen. For a space fantasy with supposedly zany characters it felt bland as fuck and could have been directed by just about anyone. I imagine the source material was really out-there so credit to Gunn for reigning it in, I guess.
But generally I sit somewhere in the middle of the 'MCU movies are all the same/No they're all wildly different' conversation. Some lean funny, some lean serious, but the meat is always slick, solid action adventure. And that's fine!