A year later...
I'm enjoying this new series so far.
The Pilot introduced a Doctor/Companion relationship that we haven't seen in a while. I was worried when it was announced that Bill was gay that it was the only way Moffat could make sure his female characters don't fall in love with his main characters is to turn them off the entire sex. But it's actually pretty fun, in a way we haven't seen since Donna, I don't think. I think Bill and Heather's relationship (and Heather's character all-around) could have been more developed, but a strong start to the season.
Smile was good up until another human being appeared. The Doctor and Bill walking around a ghost town, trying to figure out what happened while being chased by slow robots, then a ticking clock because the colonists are about to wake up and it will be a massacre. Instead, the Doctor went "Ah, f' it, let's leave the humans at the mercy of a bunch of robots they can't communicate with". Still a million times better than In The Forest Of The Night.
Thin Ice did something to fix a problem that was really bad in Matt Smith's last season in particular. It breathed. We saw Bill and the Doctor have fun instead of running straight into the plot. The fun continued through the rest of the episode, with a lot of echos of The Unquiet Dead, Rose's introduction to the past. Bill asked the right questions and I think we got the right answers. We saw the Doctor's own brand of kindness, and I like it when we're reminded that the Doctor isn't human.
Knock, Knock was a creepy, creepy episode. David Suchet is a wonderful actor, and the design on the house was great. It subverted the horror trope of the victims being arseholes and deserving their fate. They were just normal students, none of them being the stereotype (which I know exist), with their weird interests. Though again, they could be more developed. Dunno why any freshers party would be allowed near fireworks.
Oxygen looks like something my players should be worried about if/when we start that Traveller campaign. And the three episodes after that apparently form a mini-trilogy which will be fun.