Larger mood scale
Move the mood rating to a scale from 1–9. Why not 1–10? Well, currently we use 1–5, which means we have 3 as the middle value, “OK”. If we used a scale with an even number of options, we wouldn’t have a middle, you’d always have to be “just above average” or “just below average”. This would also make it harder for us to migrate your current mood ratings to the new scale.
With 1–9, 5 becomes the new middle, meaning you have a lot of nuance between 1: terrible, 5: OK, and 9: excellent.