Seems like it's more like SMT, where you can easily see what's happening.
one side will be used primarily for North/South vias while the other side will be used for East/West vias.
a board, you lose a good amount of structural support (IE; think about mounting non SMD capacitors/resistors and IC's using only TOPSIDE copper). You do gain the bonus of not having to drill any holes if you do that. ri
Does this mean that if you rotate the board through 90 degrees then it automatically flips over?
I don't know if others agree or not, but I always try to have the majority of the traces on the bottom, so that in case I need to "debug", I can easily follow them, cut them, re-route them etc. This would be harder when most of the traces are covered by components.