Assume you have all the luxuries of a modern life in your Tardis (toilet, hot showers, TV, books, game console, …) which doubles as a mini self-sufficient apartment with it’s own energy stores and generation.
Where in history would you go if comfort wasn’t an issue?
“Take care” of Christopher Columbus.
Ah yeah, spa treatments work wonders. I often wonder what path Hitler would have taken if he had a decent steam room, instead of all those amphetamines he was taking…