I almost always go for the house ending, it just seems to make the most sense. Think about it, the legion will crumble after Caesar's death, because they follow him, not his society. The NCR are a group of corrupt, lording government officials, bent on controlling every aspect of life. With the Yes Man/ independent ending, you are protecting the strip, while leaving the surrounding towns ripe for plundering. With Mr.House, however, you are putting into power a benevolent dictator, intent on bringing humanity to its feet. He will use you as a public face, while making sure that humanity focuses on technological advancement behind the scenes. You may not agree, but to me it seems a dictator leaving each person to their own projects, while helping society advance, is the best option.