@madeofcandyy It's a tie between Twilight's library or Dash's house. Dash's one wins for me, because the library would frequently customers borrowing books and that annoys me. If I lived in Dash's house I would have less visitors and the additional advantage of having a nice view to look at.
@JuandSparda_206@poniesinmyhead Not really. They were introduced late in the series and had to compete with the screentime of the Mane 6. Because of this, they don't feel like developed characters.