Eccleston was my favourite so far and Capaldi strikes me as an actor in a similar vein. A doctor who is deeply principled, instantly commands the respect of everyone in the room and full of wit and sarcasm. What set Eccleston apart from the rest for me was that when he spoke seriously, when he was deep and unflinching, you really felt it. The danger was so much more evident. I feel that every series since then has had less and less gravitas, which wasn't a problem for Tennant - he was utterly fantastic - pulled of the essential 'weight of the world' look to a tee, and the writing for his first two series' was superb. The Catharine Tate series onwards however for me just hasn't done it. The plots are needlessly complex, the Doctor (read as Smith) is nonchalant and is cringeworthy in the moments when a brooding actor was needed. It basically became much more of a kids show, which I guess isn't too much of a problem as the target audience were satisfied but certainly disenchanted me, to the extent I stopped being a regular viewer.
What I yearn for is some classic drama. I want the Doctor to face some incredibly tough moral situations and I want him to suffer, to make the lighter moments that much more pleasurable. He shouldn't 'win' every episode, and every character should be in danger. I know it's a show about time travel and crazy space aliens, but I want the human element to feel believable - just look at the Walking Dead for an example of how that's possible. Moffat's episodes under RTD were the best but his series' have had some cheap plots, and then some overly complicated ones alongside. I hope he can engineer a series with a different tone with a subtle approach, and provide Peter Capaldi with the scripts his talent is capable of nailing. For the first time in a few years, I'm genuinely excited for the next series of Doctor Who, and long may that continue!