go pros , they are the go to cameras
Go Pros are the default due to being first in the field and are the preference of 'character' TV production for that reason
For paintball, not so
They are an automatic choice, and like Hoover is the brand name that has become generic for vacuums, gopro is the name for action cameras.
It's not the ideal design for paintball - being a blocky camera, bullet cams are more practical
Gopro do not support paintball, and the latest is a model with integrated case which means if you damage the case the camera is destroyed
There are many gopro style clones and also clone designs with the same chipset
I recommend contour, but for the money you can go much further with cheaper bullet cams. You do get what you pay for, however check the features and modes you realy want / need and buy accordingly