I find Avengers to be greater than the sum of its parts - when you get those characters and ideas together there is room for some interesting storytelling but the only character I enjoy in their solo outings is Iron Man.
I can enjoy the spectacle of Thor movies but I can't take them seriously, Captain America is mildly entertaining and the less said about the Hulk the better.
I feel like Agents of SHIELD is wasted potential and I'd much rather see something focused on Agent Carter, Howard Stark and the formation of SHIELD.
I quite like the one-shots, crossovers and Easter eggs throughout.
I have zero interest in stuff that is loosely tied to the universe such as Guardians of the Galaxy, Ant Man etc.
I feel like they've done well so far to tie it all together even if some of it is weaker than I'd like. It hasn't been perfect, though. Iron Man 2 suffered from Too much Nick Fury / Avengers meddling.