So, what's your favorite task of maintaining your tank(s)? Water changes? Cleaning the glass? Feeding?
Mine is water changes. As many people are not fans of doing this, I am. I always feel the same after a water change as I do mowing the lawn - you just gave your fish a bath, & you know that it's healthy for your inhabitants. It gives me good feeling knowing that I did something really good for my livestock.
Same goes for mowing the lawn. I feel like I just gave my lawn a much needed haircut.