After also watching episode 3, I'm kinda in agreement with what Pereki said. Although most of the characters are slowly developing personalities, the knights themselves still seem like pretty bland characters that could be summed up with a couple of words each. Heck, I feel like doing that now so here we go:
Clay: The "oh I'm literally perfect at everything gee I'm so great" one, winner of most boring character 2016.
Macy: Literally Nya's character copy+pasted over to here, but with the sister thing replaced with royalty stuff. Probably explains why she's the 2nd most decent knight character-wise.
Axl: Food jokes, food jokes everywhere. Literally has no character otherwise. Next!
Aaron: The worst of Sonic's "too kool for skool" attitude combined with a hippie. Probably my least favourite due to the former.
Lance: They tried to give him the most unlikeable personality by making him rich and such, but in turn they accidentally gave him more personality in general, somehow making him a bit of a better character in general and my favourite knight.
Other than that, the other characters are slowly getting there character-wise. Jestro and the Book's dialogue is still the highlight of the show writing-wise, and I can see the show leaning towards a self-contained plot per episode outline instead of Ninjago's current story-heavy format. Either way, I'll keep watching it for the moment to see if there's any improvement.
Oh yeah, and the minifigures themselves are actually surprisingly nice to photograph, so I did this: