Matt Smith is one of my favourite Doctors. (Alongside Troughton and Collin Baker if you're curious). He could go from cheerfully energetic to pensive and dangerously calm in a moment. You actually felt he was 900 years old when he let the mask slip and could be surprisingly menacing. And Matt Smith is a good actor generally. The Beast Below, 2nd episode, cemented my appreciation of him that early on with his sadness at the end and he did a good job of transitioning the Doctor from the grief-stricken Tennant Doctor to the one that is ready to move on. The Hurt Doctor's comment about "the man who regrets and the man who forgets" in the 50th was a good moment as was Ten's contempt for Eleven's willingness to put the past behind him. Good writing.
Also, he had great chemistry with Jenna Coleman regardless of how much some here hate his character. Right from the start they were good together in a way Amy and him never were even though she was supposed to have a crush on him. Pay attention and you can see Eleven thwack Clara's arse with a chamois leather just at the end of one episode. Her face has... "interesting..." written all over it as well. Honestly, she had more chemistry with him than that psychopath River Song. I never believed the whole "turned on by her being a psycho" thing they tried to sell in The Impossible Astronaut and other episodes.
Incidentally, The Eleventh Hour remains one of my favourite Who episodes of all time. It very explicitly returned the Doctor to his roots in de-powering him from the lonely god era of Tennant - TARDIS offline, sonic screwdriver (aka infinitely powerful magic wand) destroyed and just dropping the Doctor on Earth with just the shirt on his back. Everything down to the fact he ended up in a remote English village far from London, UNIT or anything else was deliberately done to say things were scaled back. The pacing of the whole series shifted. For nostalgia's sake I'm going to sperg fully now and post the original Season 5 trailer. It's a long time ago now but I can remember how I reacted. There was so much promise. WWII Daleks, strange fairground people, shadows running through a graveyard and a city in Space flying the Union Jack. It looked great and for the most part, I believe it was. Hard core Who fans were up in arms about it though because it showed the Doctor firing a gun.
https://youtube.com/watch?v=WVVVFFPt_oA
Nobody cares but I'm going to list my sexiest companions, imo: Clara Oswald, Martha Jones, Leela, Liz Shaw.
Karen Gillian is an odd one in that whilst obviously pretty I didn't really fancy her in Doctor Who. But as Nebula in the Marvel movies she's the one thing that tipped me into going to see Infinity War Part II. I don't know what's going on in my head but I find her hugely attractive in one and not much at all in the other. And no, I don't have a fetish for smurfs - it's something to do with their characters.
Out of curiosity, what is it about The Hungry Earth / Cold Blood that you found so off-putting? I'm not arguing they're the best episodes of the run but I also can't see what in particular about them would make them so bad. I mean, you'd already made it through every Incel's favourite episode Amy's Choice.