Moffat's tenure was when I really started tuning out on the show. My unrest started with how much the show foregrounded Amy Pond to the point where it was almost a show more about the companion instead of the Doctor. From there, I started feeling bored by the overuse of the increasingly higher-stakes, universe-ending stakes in the stories. I'm pretty sure I didn't even make it all the way through to the end of Capaldi's run as The Doctor.There's a lot in series 8 that makes me WTF hard. I've always had an issue with the ephemeralness of Moffat's tenure; the stories make sense in the moment, but when you stop to process the story it falls apart. (Which is why watching it with commercial breaks on BBC America really hurt it; the commercial breaks gave one time to think about the episode as it happens.) I think series 8 is Moffat's most Brannon Braga-esque series, imho, where he goes hard for the high-concept weird shit at the expense of sanity. "Kill the Moon" and "In the Forest of the Night" are the two key moments where the weird shit overwhelms sanity itself, though "Dark Water/Death in Heaven" is right up there as well. I recognize that Moffat's era is more magic realism with the sheen of science fiction than science fiction itself, but that doesn't absolve it of not working through the implications of its own storytelling.
RTD's return, plus Ncuti's casting was what brought me back to the franchise... only to be disappointed by so many Doctor-lite episodes, quite a few scripts that were underwhelming, and Ncuti's far too short run. I wanted the Fifteenth Doctor's tenure to be so much better than it was, but 'twas not to be, I'm afraid.