Pluvia said:
Also don't expect them to be that good. Captain America 2 and Guardians are great movies, but the rest stay around the "average" mark pretty heavily. They range from "slightly above average" to "slightly below average".
...in your entirely subjective opinion, of course.
I'd say don't expect anything,
Vault - just whack 'em on, and see if you enjoy any of them.
But yeah, starting at the, er,
start is probably a good bet... ;-) I'm tempted to subjectively say skip The Incredible Hulk (just watch the Nick Fury clips on YT or something), and don't bother with Iron Man 2 ever again, but if you don't mind killing a couple of hours on the Marvel Cinematic Universe sputtering for a bit (for me that'd be IM2, Hulk, Thor 2, and maybe even the first Thor), then it's still best to go through the whole lot from beginning to end. It's not essential, but you'll get the most out of 'em that way.
Oh, actually,
do expect something: formulaic plots and structures. If you're even a tiny bit of a comics nerd and you Marvel wiki a few things, the relevance of the major MacGuffins will be-- well,
relevant and major because of where it's all headed. If not, they'll just be tedious Objects Of Power.
(and yeah, Bitter Hobbit's order is obviously what I'd recommend)