Stay your way. Come and go as you please. Stay in the city the way you want to.
What better way to see a city than to live like a resident for the duration of your stay?
Why rent a room in a hotel when for the same price (or sometimes less!) you could have a whole apartment?
"Oh no! The restaurant downstairs closes in 10 minutes!" Not in a self catering apartment. You choose when you eat and what's on the menu.