My only real complaint is that he feels too young, but then I thought the same about Whittaker. I prefer an old grumpy Doctor to a young excitable Doctor. Capaldi was my favourite of the modern Doctors because just the sheer fact of his age gave him gravitas. But obviously I'm willing to see where this goes.
I felt the same in 2006 with Tennant, though I never had qualms with Davison (who was younger than Tennant (29 vs 34) when he got the role.)
Besides, to me it's just acting - if they can make the character feel authentic, and not a cookie cutter copy, then that's all that matters. Tennant was decent. So was Smith, though his youthfulness meant nothing to the fans screaming they wanted Tennant back because they only wanted to shag him. But should all Doctors be under 40? No. The show's above trolling for ratings by relying on the audience's hormones.
Other people have been saying this is not just a young Doctor or a black Doctor but a young black gay Doctor. Obviously he's most famous for playing a gay character on Sex Education, but as far as I know he himself has never said anything about his real life sexuality, so that description is rather jumping the gun.
Hmmm. An actor's bedroom preferences don't interest me, unless they knock on the door and ask me out for a date. The actor is also playing a sci-fi character that was effectively asexual for decades - which was refreshing in of itself. Ironically, RTD's era opened the floodgates by the writers overtly sexualizing the character and companions big-time in 2005, after the makers of the 1996 TV movie (American production team, English script writer) by introducing the infamous kiss at the tail end of the piece. Even the New Adventures' novel tried to something above and beyond generic token copulation methods by discussing looms and stuff - to degrees even I found annoying, odd but true - but genuinely different and in the realm of sci-fi nonetheless. Certainly by comparison. Apparently this need to be curious on how they procreate must have nothing better to do or want no mystery from a character whatsoever is still baffling (all species procreate and sci-fi allows for more and other than wasting episodes' screentime devoted to how species copulate. Maybe they can have David Attenborough become showrunner if they run out of ideas and the fact they're bringing back a former showrunner already, one who's said to have given advice and guidance to Moffat and Chibnall if you believe Reddit and the other sites making such a bizarre claim given how many people have screeched how "Moffat killed the show", "Chibnall killed the show", "Doctor Who 1963-2017", "Whine whine whine", etc? )
I think he's the one to go back to a Sixth Doctor style outfit. The Fugitive Doctor's bright African-styled colours worked wonderfully, and I'd like to see more of that.
Not just her outfit, but bringing back Jo Martin would have been a great choice. The groundwork was already there and she was already well-received - and was unquestionably the first truly different incarnation since Tennant, and one that didn't need a sonic screwdriver to impress as well not needing the conventional and beyond-cliche "wacky act". One simple line of dialogue, if not two, would resolve the timeless child debacle while leaving her incarnation intact - as well as fixing the problem in her introduction story where the past Doctor is saved by a future Doctor (it's a time paradox, not the "timey wimey I speak baby" nursery rhymes...) Considering how much Chibnall cribbed from NuWHO and other shows, starting with Jodie's opener being a cut and paste of Smith's, it's a surprise they didn't crib showing the next incarnation in the incumbent's finale episode the way they had Capaldi teased in Smith's. Would have been a pleasant surprise too...
But the actor cast is a sign of hope, but if RTD's new era takes place mostly on contemporary Earth and does the wacky act and there's a love interest to explore with companion and another companion's family life and wears a costume that's something you can get off the rack at the UK equivalent of K-Mart, I'll probably be another person waiting for the next showrunner. Shame about JMS, it's seemingly easier to think he would have brought in something different and refreshing to the show...