Near clip is down to what mechanic and camera is at play.
Example: FPS - Camera close to weapon and other buildings, floor etc.. so a near clip of 0.01 to 0.1 would be ideal. My preference is 0.1 (10cm), but can lead to a gap at the camera.
Example TPS - Camera is further away - So a near clip of 0.3 to 1.0 can be used depending on whether the camera collides with the walls etc...
Example Vehicle from TP - This in an open world could almost get away with 1m a unit of 1.0 for near clip, but you cannot get close to walls otherwise they clip out.
Example Vehicle from FP - This is similar to the FPS, a value of around 0.1 will be good or even 0.2
The near clip is also down to whether you see flashing in the distance as this is caused as described before from depth fighting. If you have too much flashing, reduce the far clip or move the near clip up. It all depends on a game.
0.01 is a low value and is advised to be higher than this
Edit: I believe the default value in the default scene is a good setting, which is what we use and only change when issues arise with depth fighting or near clipping of objects.