I've been living in my house for 6 months. I'm in the very fortunate position of having a box room that I simply don't use. There's only myself and a partner - and our bedroom is large with plenty of room for all our clothes etc and a super king bed.
We have a guest suite extension, the 2nd bedroom is used as an office, there's a studio in the garden ... But I simply don't go in the box room, which currently has a single bed in it.
So - what would you use this extra space for? I feel that I could be putting it to much better use.