[CaptSpoogy]

Personally, I don't think any should be added. The only one I would tolerate would be power (power plants) but that's it. You don't want to have so many resources that you have to micro-manage - you got enough to do already.

With power plants, it might be a good idea if they were required to supply power to shipyards, mining facilities, etc. If one were destroyed, that planet may not be able to build ships and stuff until another power plant was completed.