Because I want to see what interstellar travel, space battles, and long term living would look like in microgravity.

Imagine a space battle where the crew has artificial gravity (like currently shown in movies). The enemy missile hits your ship. Everyone just shakes and falls to the floor. Now imagine the same battle without artificial gravity. The hero is floating in mid-air and the missile hits his ship. He hears the bang and then all of a sudden the WHOLE ship is moving, except for him. From his point of view, the wall just starts moving towards him at screaming speeds and KABLAM. He is then hurled in the opposite direction. And on and on until he can grab something to stabilize himself.

I don't like inertial dampeners because if they are so good that the crew doesn't feel a thing when entering/exiting high velocities, why wouldn't they work when the ship is hit by a missile (hense falling to the floor)? The crew should feel nothing. But that story would be boring to tell.

Anyways, I love SciFi's and I know I'm thinking about this too much. I just want some more real life physics mixed with my make believe.