I feel that I've seen enough of him now to make an opinion.
I think he's the best Doctor since it came back in 2005.
I think he's an improvement over David Tennant and Matt Smith because although they had their moments, the wacky shtick they both had seemed to be aimed at small children for silly comedy kicks.
With Capaldi I think he's more plausible as a character I can believe in.
I also rate Chris Eccelston highly, but I'd probably put Capaldi above him as well.
His comedy isn't laid on with a trowel. He's funny in an effortless way in which he often has many funny throwaway lines which suits my sense of humour more.
He also has the gravitas which is necessary for the serious moments too.
There's nothing I'd fault him for. Except for the stupid sunglasses. That's the only negative I have with this Doctor, but that has nothing to do with Peter Capaldi.
Moffat, ditch those sunglasses. They were a stupid idea, just admit it.
Peter Capaldi could well end up being the best Doctor ever, if he isn't already.