My military flying dictated that I wear a helmut and about 30 to 40 lbs of life saving gear. While the helmut would give you some protection during and after explosively leaving the cockpit, it's main purpose (in my mind) was to give me a good anchoring position for my O2 mask which was much needed. And that helmut, O2, comm, visor combination had to stay put on your head during 6+Gs of flight.
Feel the freedom of not flying a military plane and not having to wear an O2 mask. For ultimate freedom, get the anr headset that goes in your ears (like ear-buds).