Great character development (Steven went from being the bratty little kid to someone who's pretty nifty. Pearl went from being the helicopter mum to being kind of cool - I love the episode with Greg and her hashing out their friendship. Peridot is amazing, but kind of funny.), great casting (Garnet's voice is amazing, and everyone's songs are very memorable!), and a mysterious show (we still don't know anything about Homeworld).
I love the show, but Steven Bombs are pretty much stress.
And even the "fillers" are pretty good.