I live in Georgia, and here's the lowdown. It basically depends on where you get stationed.
Universally Georgia - these traits are found anywhere in the state:
Hot - While it usually doesn't top 100, summer temps usually stay above 90 during the day in the summertime. Very mild winters, though. It hardly ever snows.
Humid - Georgia has dozens of lakes and rivers, plus a coastline. Be prepared to drink the air.
Wildlife - More species of plant and animal than you can shake a stick at. Of course, that means more allergies than you can shake a stick at, too.
Friendly - People in Georgia have inherited the fabled "Southern Hospitality." Expect politeness, manners, and respect anywhere you go. Those who don't give it to you had a bad mamma. If you're wearing your uniform, it gets even better.
Girls - Those guys in New England claim their girls are the best looking because they have more models. Bullcrap! Their girls are only good-looking in a fake way because they have on too much makeup. I mean, look at the Kerry kids (ugh, face as long as a horse's). Georgia girls are good looking with normal clothes and no makeup on. It's a fact, and due to the previous entry, they're the kind of girls your parents would approve of.
North Georgia - These things are true in North Georgia, which is the Atlanta area and north of it.
Mountains - Get used to walking up and down hills.
Atlanta - It's noisy, crowded, and loads of fun. Just don't try to drive...whithin a 100 mile radius.
Water - The Chattahoochie River and Lake Sidney Lanier should keep the outdoorsman in you entertained.
South Georgia - This is everywhere south of the larger Atlanta area. I don't really know that much about it since I don't live there.
Swamps - Not as bad as Louisianna, but pretty bad.
Mosquitos - If you spray on bug repellant, they'll just dump you in the river to watch it off before eating you. You might just want to pack heat.