Welcome to the RTA Forum!
I'm in agreement that with 10 days you certainly don't have to take the most direct route. You've got quite a bit of time to work with, and your options are almost endless.
I'd start with things in your area that maybe you haven't gotten around to see. When you live close to things, its easy to put things off because you know you can always easily get there someday. When you live in Vegas, you can go to the Grand Canyon on an easy weekend trip, once you're in Atlanta you won't have that opportunity.
So if you haven't been to the Grand Canyon, or the parks in Utah like Bryce and Zion, I might start there. If there are other places you've always wanted to go, this would be your opportunity, whether its Colorado or Texas or pretty much anything in between.