I moved here from Illinois several years ago and loathe the thought of even going back to visit.
The gun laws here are very lax in comparison to Illinois.
There is open carry as well as concealed carry.
There is no waiting period on any firearm purchase.
Tennessee does not have a castle law but we do have a "Stand your ground" law which essentially states "No duty to retreat, regardless of where attack takes place."
More referenced here:
http://en.wikipedia.org/wiki/Castle_doctrine#States_with_a_Castle_Law
Tennessee is an NFA friendly state. NFA firearms are title 2 weapons which include short barreled rifles/shotguns, full automatic weapons, and silencers. There is a process for obtaining the tax stamps required to own these types of devices. I have several tax stamps and build my own silencers for a hobby.
Then there are the mountains and parks. We live close to several ranges and I bicycle through them whenever I get the chance.
Lakes for fishing. Tennessee does a wonderful job with fisheries management. Boone lake is almost a stones throw from my house and is considered a striper trophy lake. The Watauga and Holston rivers are also considered some of the best trout rivers around as well.
Tennessee does rank up there in corruption though. A lot of good ole boy networks.
The sales tax isn't that bad. Much better than the Illinois income tax.
For the most part the roads are really good.
I love it here and will never move. Well maybe to Montana or Wyoming if I ever get fed up with technology and just want to go find a ranch to work on for room and board.