tonight, all night so I can watch the new additions settle and make the place their own

. Normally on a daily basis I put in around 5 or 10 minutes an hour just observing interaction, signs of disease, plants dying etc.
A bit of observation is the best way to get an idea of how your tank is doing - there are so many things happening but when you actually take a good look at what is a true living environment you can see what issues need dealing with. Are my plants dying? do I need to move that plant for light, is that fish shy and not getting enough cover, is that fish being bullied, are they pairing off, he's slow, and not swimming properly........ feeding time will tell you how the tank is doing......
I feed my fish then wait to see which fish want and take food - this is when they are most active and a good indicator of general health. Any fish that don't come chasing food get more of my attention and observation - its also a great time to watch their personalities develop and see who thinks they rule the tank and who is in charge, who is first to the surface for fresh flake.....
For me, the enjoyment comes when you lift the lid and the bold and brave come to the surface to pick at the food from your hands. Then they are friends, not furniture.