I see a fair number of posts stating that Military star bases are not worth the time/effort/money except as a way to increase your military rating. I find this strange and wonder if the problem isn't between (my) keyboard and (my) chair.
Basically, after I am finished with the colony rush, I start setting up a perimiter around the main bulk of my worlds. I usually put the warp field disruptors (-2 warp) module into Military star bases in an overlapping line. That is it. Just two modules. Then I sit a fleet (or two) of ships on the star bases themselves and watch for incoming ships. As enemy ships approach, I pick them off, usually leasurely as my ships can usually fly circles around them.
Later on, when income is more prevelant, and warp engines more standard, I will sometimes put in sector scanners to increase my range, and the +1 warp bumps to my own ships, but basically this provides a great way to monitor my borders without hosting a ship at each planet.
And when the borders change, I will assess if I want to leave the line where it is and build another, or dismantle the current one in favor of the next line. Usually I will leave it (though undefended) so that, should I need to drop back into my own space, I have the speed advantage over the pursuing ships. Also they provide great "Primary" targets for whenever an enemy wants to make a point. They go after these low cost targets in stead of my planetary defenses, thus giving me yet more time to respond.
With that having been said, i know that Econ star bases can do a lot to increase research/production with modules, and I use them. But my personal opinion is that these star bases can cost a lot, what with 10 + modules, PLUS defenses, and it really hurts when they get taken down.
Am I missing some point?