building the snapshot for the sake of it is something that I discourage people to do. Why? Because everyone that creates snapshots, or does full builds, taxes our SVN server, which already is at its limit.
The snapshots are delivered quite often, so I don't see a real need for anyone to do it themselves. If anyone wants to do dev work, go and setup a build env, do a full build once, and from than on, do your work in your checked-out tree and build your stuff. No need to create a snapshot imho.