My house always looks lived in. There are posessions: nicknacks, pictures on the fridge, books, CDs, photos, a pile of letters etc. If you asked a stranger to walk in and write 10 statements about what kind of person I am, they could. Things aren't matchy-matchy. Rooms have their own colour scheme, but items are an organic collection over time, not bought specifically to match.
As to its state of tidiness. It's generally towards the slovenly end, but fairly redeemable. At the other end is the in-law blitz a few times a year, which will result in most rooms having a thorough tidy and clutter dealt with. In the middle is a functional tidy with the majority of surfaces clear, but some piles in a fairly organised state.
So always lived-in. Not always a shit tip 