I can relate to this thread, thanks for raising the subject. Personally, I play a lot of computer games and read to fill the time.
I find that being sober all the time means that you observe more of life, raw and real through sober eyes and are able to react and respond to situations with more humanity.
For example, my brother-in-law died recently and when I was at the funeral there were a bunch of people I hadn't seen in 25 years. If I had been in my usual hungover state I would have recoiled from greeting and engaging with them and would have missed out on the warmth of the conversation, the happiness I got from reliving memories through them, the realisation of how close relationships of affection don't change much over the years, etc. 'Little moments of beauty' I like to call them.
This is what being sober opens up for me and is why I strive to maintain sobriety. It's to be open to more of the things (little moments of beauty) that really matter in life.