Creating complex objects in 3-D is challenging enough, but since everything has to live in its own 3-D space, rotating your view early and often can prevent my little mess-up shown below.
It can still be aggravating, since moving the latest pipe can often mean re-creating the entire thing. Particularly since the top and bottom of the pipe are on completely different 3-D planes with separate origins.
pipes look fine in this view
Rotate things and oops.....
Ignore it and hope nobody notices? Nope, that compromises the whole drawing, Can't do that.