I probably enjoy watching my fish as I wake up in the morning as my tank is parallel to my bed. Also i enjoy doing maintenance, such as water changes, as it takes up some time 
before i go to bed. i sit on the floor and just watch for like 30mins -1hour
after work, after school, and water change!
After a long stressful day at work, I love to sit and watch my fish/ I'll pick an aquarium, sit down, and unwind.
But usually evening's after work and the boys are down for bed, there nothing like some jazz and a cold beverage while watching my water kids...