I didnt watch the last series,so I have no idea what it was really like,but what I can tell you about Tennant is that he should be quite popular!
He plays it as a Londoner,complete with common man accent,and seems to be part comedian,part warrior (he partakes in a sword fight a la Highlander).
His humour seems somewhat sarcastic,which is good,and I can see definite inspiration from previous Doctors (the two Bakers & Troughton spring to mind).

I think you girls will like it!

Snarf is shit. His death will be rejoiced!