I have found Alabama to be a pretty reasonable place to live, all things considered. Yes, there is the humidity, but the houses have AC, and I do my outside work early mornings, and late evenings. The house prices are cheap, for the most part, and since it isn't usually really cold in the winter, utilities are affordable.
Another think I like here is the longer growing season, and some things will grow until late fall, with a little encouragement.
We do have to consider tornadoes, but those are not very often (although disastrous when they strike), and no worse than earthquakes, hurricanes, erupting volcanoes, and some of the other natural disasters that many people have to deal with.
All in all, I think it is a pretty good place to spend my senior years at.