I'm lucky enought to have a utility room in the basement for all of my tanks and fish stuff. No tanks, fish stuff, disruption, etc. around the house goes a long way to keeping the peace.
I give my wife at least half of any funds that I receive when I sell fish and fish stuff. Dropping her a couple/few 20's a month out of the blue never hurts.
Also, my daughter (who will be 5 in June) likes to help feed and even change water. Keeping her out of my wife's hair for awhile is also a good thing.
What I find funny is that - I think from her perspective - it's better for me to sit on the couch and watch TV... than for me to spend the same time in the fishroom (listening to music, watching fish, putzing around, doing water changes, etc.).
Matt