Take note that the VHF frequencies will be for the civilian aviation only (Private aircraft, police / medical aircraft, etc). The UHF will be for the military aircraft... you will hear the 129th Air Rescue Wing on this frequency flying around in their J-Hawks and C-130s... they fly pretty much daily. It is a excellent listen during the evening hours during the summer... the 129th also does air quality measurements for the Bay Area Air Quality Control Dist. The coastguard will on occasion utilize Moffett for refueling and other opperations. I have heard them both on the UHF and VHF channels.
All in all, on a day to day basis, the VHF is like your average ATC, and the UHF has some decent (i wouldnt call it good) military traffic
Yeah, my science teacher flew with them for awhile... They'll do exercises down in Fort Hunter Liggett every once in awhile, so sometimes I'll catch a hawk flying thru the Salinas Valley on the way back up to base... That sound of a large four-blade aircraft is unmistakeable around here... Probably because the fact that the most that I hear flying over my house is the little Bell 47 cropdusters and CALSTAR (2 and 5) .