From personal experience whenever someone asks for advice they already have their mind up on what they are going to do. As far as whether or not to joining at this time all I can tell you is that today is just like any other time in history no one knows what the future brings. Will the US declare war on Iran? Will we be at peace for the next few years?
Your next issue: not wanting to be away from your family. Honestly if this is your biggest concern please don't waste your time. I'm not trying to be harsh here, but what happens if you get stationed in Thule Air Base in Greenland?
Now for real talk since you already have your mind made up on joining. Whatever your recruiter tells you,
DO NOT sign a six year contract.
Pick an AFSC that gives you some real world skills so when you get out you're not just another statistic.
As far as AFSC's go which ever one you pick will limit your duty locations to which you can be assigned. For example let us say that your recruiter hooks you up with cool job. That job may not be so cool because as a 3 level you may only be able to go to a handful of bases.
Here is a link to various Air Force jobs:
http://usmilitary.about.com/od/airforceenlistedjobs/a/afjobs.htm
Just do some exploring click on a job and go to "Air Force Assignment Locations"
By the way I spent 4 years in the Air Force, and no I didn't enjoy it. I had an 88 on my ASVAB, but I'm colorblind. In retrospect I should have walked out of MEPS when they showed my the 10 jobs I qualified for, but I didn't so live and learn.