They do say your favourite Doctor is the one you grew up with. For me that's Jon Pertwee and Tom Baker. I know, that's two The Doctors. If I had to pick it's Tom Baker. But Pertwee had the jalopy, and the jiujitsu, and the biceps with the cool tats.
Anyway, I just wanted to chime in to agree with
@Ruin Explorer. The Doctor as lonely space god is just not interesting. It's all too Childe Harold and Young Werther for me. I was an angsty teen once upon a time; I get the appeal of the lonely, unique, tragic hero figure. I wanted to have my angsty, no-one understands me feelings reflected and justified. Then I grew up.
The Doctor as a rebel. As a little person in a big universe just doing what he can to help. Someone who can consider the ethics of destroying the Daleks before they become the menace they are. That's an interesting character.
What I can't decide is my favourite companion. Sarah Jane Smith or Romana?
Sarah Jane does suffer a bit from damsel in distress syndrome. But for the time (early 70's) she was given a good amount of agency and competence. Sarah Jane in later appearances (e.g. her own series)
Romana was an excellent foil for the Doctor. She was his equal in every way. Hell, academically she blew him out of the water. Whereas the Doctor had the street smarts and the human warmth. Romana developed these as she went along of course.