Emfosho
Those are all really individualized questions that I can answer, but take everything with a grain of salt because my answers will be different from others here.
1. I picked Carolinas because it is an unbelievable program with strong clinical training, great residents/attendings, and opportunities to do just about anything I want to eventually do (lots of fellowships, tons of research opportunities, prehospital work, leadership opportunities, etc). We also have family here in Charlotte, which was an important factor in the end too. I love UNC's program as well (also great training, great residents, lots of cool attendings and a great PD, tons of time at Wake Med, etc), but I spent 11 years in Chapel Hill and it was just time to get out and go to a new place and new city. I've got nothing but good things to say about their program in general.
2. The residents are actually pretty similar at both programs and I like both groups alot. There are more of us here in Charlotte and we're about to expand to add 3 more residents per class for the match starting the year (up from 11 to 14).
3. "Lifestyle friendly" is a relative term. Residency is hard no matter where you go, but both places are supportive and very family oriented. I think we probably work a few more shifts a month as 2nd and 3rd years and probably have a few more off service months than UNC, but I'd have to talk to my friends at UNC to see their current rotation schedules (as I'm sure you know, these do change and shift over time). Other differences is that we only train at one site and have conference every day, whereas UNC trains at two very different sites and has conference once a week (that may sound trivial, but it really shapes the culture of both places).
4. Not sure if either place compares to anywhere in the southeast. Every program has their own flavor and you'll see that when you interview. In the southeast, my other favorite programs were Vandy and Wake (my other favorites outside the region were Indy, Pitt, and Cincy).
5. Residents here at Carolinas seem to get great job offers and generally go to their region of choice. I'm not a third year, so I dont' have many specifics...but that's just my general sense hearing people talk.
Hope that helps!