I thought they were trying too hard to get across the whole "WHEE! NEW!" thing.
And I think the thing that made me hate it most was the sets. In all the previous season the sets have been largely uniform for each episode - whereas this episode had them jumping from Tardis to the flat to the bunker to the ship to the street every 30-40 seconds.
And there wasn't really even a plot. It was just: Aliens show up, be evil, Doctor wakes up, kills the leader, aliens leave, aliens die horribly.
No foreshadowing, no subplots, no gradual exposure of the plot arc.....
And I'm not a fan of the lighting in the episode either. It fails to create a sense of atmosphere.
Oh and Rose's speech annoyed me. She should've started out all panicy and ****, then got mocked and toughened up. She vapourised a Dalek fleet not 3hrs previous, for **** sake. She shoulda just made some big speech about Earth being under the protection of the Time Lords - tried to psyche them out instead of bull****ting them with treaty mumbojumbo.