I started watching Dr Who way back.... Jon Pertwee... and have seen most of the earlier doctors through repeats and videos since. Work/Life commitments meant I missed many of the 6th Colin Baker & 7th Slyvester McCoy episodes. I've seen all the recent resurrected series since where the basic format of the programme changed from multi-part episodes (with cliffhangers) to longer single story programmes with a story arc running through the series.
I'm liking the Capaldi version, though the character hasn't quite "settled into" the part yet. This is a process that ALL the previous incarnations have gone through, so that in a way it's a little early to judge. I first saw him when he was in "Local Hero"... and to be honest haven't kept up with his career since. Though I like the fact that there is now an "Older" actor playing the part of an "Older" Doctor once again... it's been a while. In fact, there hasn't been since William Hartnell (and Peter Cushing in the two cinematic releases, if you count them... which I do
)
The latest episode "Robin Hood" was an interesting one, the writers have taken a bit of a risk with it. Slapstick combat is a bit reminiscent of the Slyvester McCoy era, but merged with more serious Hartnell/Cushing version. The best bits of Dr Who now are the interactions between the Doctor and his companions, which, from Billie Piper "Rose" onwards have taken centre stage. I'm loving his interactions with Jenna Coleman's "Clara", very amusing.