From what I've seen flying various AMC aircraft, FAIPs fall into 2 categories:

1: those who are good pilots, willing to learn and can take instruction in a CREW aircraft from both officer and ENLISTED (something not often taught in AETC)
2: those who think they're great, find every opportunity to exhibit their "knowledge" and skills at the expense of learning, and fail to listen to senior enlisted loadmasters/engineers (a good way to loose your bags in Uganda while on a 3 week trip -- oops).

Basically it will fall on your personality that will make or break you in the real world (Non-AETC). I'm sure the FAIP gig is fun and has it's perks and I'll take some flak for my next comment. But, I see that as a high school kid who still lives with his parents after graduation. Sure, sticking with what you know is easy and flying the same plane after graduation with the same mission day in and day out has it's benefits, but until you actually execute the missions which the AF is designed around, it doesn't seem very gratifying. Stop trying to predict the future. If you stay as a FAIP or go to another aircraft - at the end of 10 years you should have more than enough hours to have a good resume for any airline job should you decide to go that route. Whatever you do, do not burn bridges, and don't be a Dick. The students you have a as a FAIP will be your aircraft commanders/instructors/examiners in your next life. You may make it to IP in your next jet in just 6 months, but credibility in the jet is a whole different issue--enlisted personnel will can make or break you regardless of your level of effort as a pilot. Staying at a UPT base for 4 years you will have a lot of students and they will remember YOU if you give them reason to.