@Retro, there are some which are fairly extroverted. For instance, 119-2.
True, but on the whole, both sets are quite light in nature and could still be seen as relaxing music. Not all relaxing music has to be a slow dirge.
On topic, if you want to go the way of Sorabji, check out his nocturnes: Gulistan - The Rose Garden, Djâmi, and Le Jardin Parfumé. However, these arent as "nice-sounding" as some of the Chopin nocturnes, but still relaxing, in my opinion.