You generally find new fishkeepers stress about getting the water conditions exactly right, worry about making sure their poor little babies have all the exact environment so they're nice and comfortable, use only treated tapwater to clean the outside of the glass because spit and a paper towel might alter the PH...
Fishkeepers with 10+ years experience are more like, "Time for a water change?" Dunk bucket in in the tank, dump it out on the lawn, refill with the hose. Oops, threw fish flopping around in the lawn, better throw him back. Don't care, he's a bastard anyway...