If I don't have the energy available to run starships then it isn't an open choice to take, now is it. Fact of the matter is that I will always open the same way. Build my cap of available ships, build 5 mobile builders, move to neighbor, pop the gate and establish a beachhead. That one defensive position must be able to handle everything the AI can possibly throw at it in the worst case. Threat Fleet, SF, waves, and CPAs. Once that is up and running, I will see what energy I have left and build my fleet around that.
So yeah, that is playstyle. One based around a heavy defense.