I have 5 at the moment, with a sixth on the way (which will be my first 7 string - built by ET Guitars).
Only one of them gets the most play time. Which is strange, kinda makes me think why I keep the others around. I can't sell them though. The reason isn't tangible, I just can't.
All the guitars I have are different. Shape, and if they're the same shape they have different bridges/pickups/neck types.