I'm loving the new Doctor Who! I was a little wary of Matt Smith at first when he first came in at the end of Tennant's run (I HATED the "Geronimo!" in his introduction), but he's been really good so far. I think the writers are still writing for David Tennant a bit, but Smith is playing it a bit more grumpy and irritable. I also like the design of the new Daleks, but not the way they're multicoloured.
I think the tone's a little closer to the Tom Baker Doctor overall, and it's good to see them actively trying to give kids nightmares, which has always been part of the point of Doctor Who.
I like that the weeping angels are back, and think it's cool that it's a two-parter (possibly three-parter?) I think they're an awesome villain concept and hope they stick with the rules established in this serial when they start cropping up as recurring villains.