I've nearly caught up on this show after having only seen the first season a year or more ago. HOLY COW. Season 1 got a lot better as it went, but now it's really become an awesome show that can stand on its own merits.
I particularly love how they've developed the characters--at first, they all fit into standard TV stereotypes and seemed super generic (except Coulson). But over time, every single one of them has completely shattered their mold. The characters I thought were just going to be glorified comic relief (Fitz and Simmons) are now some of my favorites!
Anyway, yeah, I'm surprised there's not already a topic for this show. Discuss away!