I respect the tiny house movement, however I KNOW it is absolutely not for me! It is absolutely fascinating though, so click on the link if you're interested in finding out more about what it's all about :-)
Reasons why a smaller house (Ours is about 1,400 square feet not including the basement.) is better:
Less to clean which in turn makes it easier to clean.
Less stuff needed to fill it, less stuff to worry about or stress over.
Smaller house, smaller bills (especially heating and cooling!).
Also less homeowners insurance because it's not as expensive to replace!
Makes being organized a necessity, and that is good (as long as we you do it).
Smaller house for might mean a larger yard - great for bigger gardens!
Negatives to a smaller house:
Not a lot of room for company - just have most of your parties in the summer so they can be outside!