If you are going Air Force, civilian pilot hours get formulated into your PCSM score, which stands for Pilot Candidacy Selection Method. Your PCSM is composed of your pilot score from the AFOQT, TBAS, and civilian flight hours, up to 200 hours.

For example, I had a PSCM score of 50-something, and then I took 11 hours of flight lessons and my score went up to the 70's. I reached the 200 hr mark and my score was a 97.

Plus, any pilot knowledge will probably help out on the pilot section of the AFOQT, and playing video games should help on the TBAS.