Favourite film is Winter Soldier, it's generally the best film and feels truely like a comic being made into a film instead of all the other ones being films based on the comics. It is paced well, deals with personal things, has Zemo as a talking camera with a screen as a face (massive fanboy moment that). Cap doing cap things with his friends, like Gruenwald's Cap. Only thing missing was Diamondback.
My favourite series is Gaurdians as I feel it's films are the most consistant, ignoring the fact it turned comic Star Lord into a sarky dick, instead of the serious guy he was.