Three things I love most about the MCU:
1) Consistency. I think it's amazing that they've been able to achieve a standard level of quality in their films since the first Iron Man in 2008. It speaks of the quality of creative control they have in maintaining their brand despite coming out every year. And even when a film becomes something of a dud upon release, they manage to adapt and bounce back with an ever better film the following year. Examples being Captain America: The First Avenger and Thor becoming successes in 2011 after the dud that was Iron Man 2 in 2010, and Captain America:The Winter Soldier and Guardians of the Galaxy in 2014 after Iron Man 3 and Thor The Dark World in 2013 had people worried.
2) Risk. I always find it laughable when some people label Marvel Film's product being generic or run of the mill, and that they avoid risky projects. Do people not realize what a risky proposition some of these films are? A movie about a Norse Thunder God walking the Earth? Another about a cheesy WW2 era superhero? A space opera starring a talking raccoon and a anthropomorphic tree? Plus trying to tie all these films together in a shared universe? THAT is a risky endeavor no matter how you look at it. Plus let's not forget the talent that they hire to direct these films, which brings me to...
3) Talent. If you look at the directors Marvel has hired to make their feature films, you'll note by browsing through their filmography that none of them have had a big time blockbuster on their resume. Jon Faveau? Kenneth Branagh? Joe Johnston? James Gunn? The Russo Brothers? None of them have had big time successes that would qualify them to make a summer tent pole, yet Marvel is able to trust in their creative vision to make their properties shine on the big screen. Despite Marvel's strict creative control, each director is able to leave his own creative stamp, making each of Marvel's films feel diverse and fresh. I really hope they continue this trend for as long as they can.