I was largely unimpressed with the new series, Matt Smith is alright, and Amy can be funny, but they both get kind of annoying at times, that's where you wish for David Tennant to pop out with some witty anti-monster humour and some intelligence. To me, it really gives the impression that the show is becoming a wee bit on the childish side. 3/4 of the 'monsters' aren't even scary, and you can tell when the ratings are going down... how?, well the next few episodes just happen to feature Daleks lol. IIRC the new series also had some budget cuts to work with, all over imo the script was pretty boring and predictable. The best thing to happen to the series was River Song but even that got confusing at times.
I think the best series was with David, simply the best... So don't get me wrong, nothing really wrong with the new cast, but I think the script really needs to compliment the actors better, as Matt Smith can't really be serious all the time and is a bit childish as the character, but why can't he be childish... and trying to stop the Daleks?
I mean that would be pretty good, these days he just gets really serious and seems utterly fed up when he meets foes he has already defeated like 15 times, though I suppose I would be too haha.
But really, this new series is like a stark contrast to older series and casts. And my god was the Christmas episode bad? :O The 2008 Cyber King Christmas episode (The Next Doctor) was so much better, then we had the Voyage of the Damned on the Titanic and "The End of Time" where the timelords returned, then we get that piece of crap, The Doctor, The Widow and The Wardrobe... <.<