I have spent more time than I care to share in CLT but it is still my favorite airport. The layout is super easy and I feel comfortable knowing that I landed in C Terminal but am connecting in E Terminal, I know exactly where that is and how long it will take me to get there. I know where the decent food is at or if there is a TCBY nearby. It's like going to the mall in your hometown. I've already scoped it out and no where not to waste my time.
They always have free wifi and you can find power outlets all over the place. It's easy to find a spot to plug in and get some work done or just relax in a rocking chair on the main concourse. CLT feels small enough that you feel comfortable getting around but large enough that they're still getting shit done.