Can I say how much I enjoyed having so much diversity among the cast of characters? Season one gave us a main cast that was half full of badass woman, two of them being women of color. Both seasons gave us a slew of other women and people of color, both as major and minor characters. Thumbs up for that, Marvel!
Ties to the overall Marvel universe are not the only thing that the writers kept an excellent handle on; within the show itself are a multitude of multi-faceted characters who have new mysteries to discover all the time. The many and complex threads in the various episodes were almost always consistent, which is impressive considering the episodes are long and numerous. The writers kept their hands on the reins throughout the entire crazy ride of spy adventures, uncovered secrets, more uncovered secrets, character development, shocking turnarounds, and more. My dad compared the series to a soap opera, which is very apt considering I could not stop watching until I absolutely had to. By the end of each season so far, little is left undone or overlooked.
Honestly, anyone who appreciates good writing, well-rounded characters, thrilling action, oodles of sarcasm, or Marvel in general would appreciate Agents of S.H.I.E.L.D. So if you haven't seen it yet, what are you waiting for?