It depends on the amount of homework I have. On a good night, I could spend up to 2 hours on ACNL! Typically, it's half an hour to water plants, talk to villagers and check main street.
Anywhere from 1-3 hours a day usually. I like to pop on to do my dailies, water my flowers, find the fossils, buy from nooks, then lastly check on my villagers. I need more casual time to spend with them instead of running around with all these chores. lol
Usually around 30 minutes in my second GCN town every day and around 3 hours in my New Leaf town every day. I only play my first GCN town for around an hour once every Saturday. Once I get City Folk/Let's Go to the City, I might only play my second GCN town once every Sunday for an hour and I would play City Folk/Let's Go to the City 30 minutes every day, just like what I did with my second GCN town.