>>31434180First of all it started when the BBC had fuckall budget, so it had plenty of SOVL
Then it hit 4th Doctor era, where it got a few great writers like Douglas Adams to put out good stories and a great lead actor to carry it
7th brough in the whole 'actually this funny dude you grew up with is fucking Light Yagami in disguise'
Then after the reboot you got hunks for the teenage girls combined with that whole 'actually I'm a badass genius nerd who can kill entire planets, but also is secretly full of angst' hook
Currently the female Doctor (who was told explicitly not to read past material, who does that) and the fucking shitty writing has the show at a low point.