After years of basement tanks my reef is in my dinning room. While this can be a little problematic for maintenance, it does force me to be a lot cleaner then when I had everything in the basement. While I would go down to watch the tank everyday it was for a much shorter time. Having it in the dining room means everyday we are home for dinner, which out here in the middle of nowhere is 99% of the time we all get to enjoy the tank. Or lunch on the weekends.
The living room is great too, but in the living room you are often watching tv + looking at the tank. In the dinning room I find not only myself but my wife is looking at the tank and captivated either waiting for dinner or after dinner. I do have my fowlr in the living room as well which does work too. Practically speaking the dinning fits my reef tank best and the laundry room is directly behind so getting water to and from is very easy but I really enjoy having it there.