Gravity makes difficult the lifting and movement of massive objects.
It makes our feet tired and actually causes us to become shorter as we age. Although gravity is a powerful limitation, we would not want to be without it. As fun as it might appear to fly in space and frolic free of gravity, the absence of gravitational force yields its own set of very difficult problems. With no gravity, you'd have to tie down all of your furniture, food crumbs would migrate to every corner of your house, your computer's mouse would wander off, and you'd never be able to fill your bathtub for a warm, relaxing soak. Gravity, as limiting as it is, also makes many things possible, including the very existence and stability of the planet.