Much better RE photo, but you have to straighten the verticals, and that is easier when you shoot at eye level and use a bubble level to confirm the camera is perfectly straight.
Agree about verticals but I have found mid chest level is usually best. Eye level makes ceilings too prominent while mid chest emphasizes floors and the room overall. My clients have been quite specific about floors being more important than ceilings. I set my tripod height when I first arrive and usually never change it throughout the house. That gives a consistent look to the set.