Aye exactly-I'm gonna list all the factors I can think of
1)AA units! They count too!
2)Numbers are great, but I'll take one advanced fighter against two middle-aged soviets any day (don't know about 1:3 odds though)
3)Ability to get those fighters in the air
4) Mobility (carriers)
5)Intel (when it counts, yes, it is reliable-assuming it's a wedding party we're trying to blow up

)
6) Technology (The ALQ-something, supposed to be super-effective against AA missiles-guess who has it?)
7)Personnel (best programs are generally run by US-friendly countires, UK, France, Germany, etc.)
8 ) Ground forces! They help too, you can't capture airfields from the cockpit.
I had more, can't think of them now...
The only countries we would ever face a serious (I mean like, serious, of course the other countries would be trouble) are ones that simply have massive armies and amounts of aircraft, which eliminates Iran-for some odd reason i doubt we'll be getting into a fight with India, which leaves just China. Whew, would that be interesting.