Having seen all of series two, I have to be fully honest and admit that I did like series one better overall. I think that has a lot to do with, as Secret pointed out, a certain lack of consistency. The episodes seemed to fit better together overall, and it felt like a full circle arc from the beginning to the end. And I am probably one of the very few who preferred the slightly darker Doctor that Eccleston portrayed.
That being said...David Tennant is excellent! He is certainly more of a "traditional" Doctor, and he brings such great energy and originality to the role. The effects in series two are a bit of a step up from series one, I was especially impressed by "The Beast" towards the middle of the series.
While there were aspects of series two that disappointed *cough*episode 10*cough* (seriously, skip it
), I will <b>definitely</b> be tuning in for series three! And anxiously awaiting Captain Jack in Torchwood.