Just interested to see what others would do in this situ - We have a pretty typical 4 bed semi for our family of 4 - 2 large doubles on 1st floor, one box room, bathroom, then loft double bedroom with ensuite. Box room is used as a study and each daughter has a double room and we have the loft. Plenty of space for all, we're very fortunate. The 1st floor bedrooms have really great storage, double wardrobes in each. Large shared bathroom. Loft has a tiny shower room and awkward storage, it's a big room with lots of floor space but very awkward storage. My 15 year old has asked if there is any possibility of her having the loft room as she would make better use of the space and spends lots of time in her room. DH said no way as it is the 'best' room therefore should be ours.
I have never loved the room - it gets boiling in summer, the ensuite is really tiny so I use the main bathroom anyway, i don't particularly enjoy hearing DH getting up and peeing in the night, and the storage isn't good for 2 people. It has loads of floor space, so she could have a little sofa in there, which we would never do as we only use the room to sleep. It has nice views. I'd be happy to swap, on the understanding that if / when she moved out of home and we or her sister wanted the room, she would have to go along with that. DH thinks I am nuts in considering her request.