Doctor Who... A Tennant retro

What with the final Tennant episodes looming over christmas I got to thinking about how good he has been as the Doctor. Answer... epic!
People still moan on that the modern Doctor Who isn't as good as the old one well to them I say FOOLS! Now I ain't ragging on old Doctor Who but the new series are so much better. Where as the old series seemed a bit 2D sci-fi the newer ones have deep emotion and character development you just don't get in other sci-fi tv shows maybe thats why it's been taken up by the British public so well, and not just cos it's a fuckin institution. As an example the laitest episode "Water on Mars" took me to a whole new place and even at one point made me think "DAMN the Doctor's a bit of an evil dick". Not only this but the way they put hints through whole series the at the end BAM! they all come together for a massive finale is brilliant.
And this in my opinion is down to a stella 3 series performance by Tennant who really seems to understand the role he's playing and makes the character relateable and human but at the same time distant and alien. But all good things must come to an end and soon Matt Smith will take over, I'm sure he's going to be great as well they don't muck around when choosing Doctors.
So I ask what did you think of the last 3 series and where the show might be heading next?

Oh and can't wait for "The End Of Time".