Pay no attention to the blasphemer, he hasn't watched any of the newer stuff. I doubt he's even seen a single Matt Smith episode.
It's an incredible show. The reboot is way better than the original (As much as Tom Baker is kewl; cheesy and campy < intelligently funny, semi-serious and cool), and the writing has been nothing short of fantastic these last two seasons. Steven Moffat has been on a roll with Doctor Who and his other awesome BBC series, Sherlock.
As for favorite episode...I can't choose just one, bro. "Blink", "The Silence in the Library (Parts 1 and 2)", "The Impossible Astronaut (And Day of the Moon)", "The Girl who Waited"...too many good ones. o_o