Well,
I'm in way better shape. My endurance surprises me. I'm definately stronger, but that has more to do with hauling dive gear as opposed to actually diving. I've lost a couple inches on my waist since I started and I've lost a little bit of weight too, not much, as my body composition has changed.
And the really cool side effect is that I have a better body image. I see what it is capable of, as opposed to what society wants it to be.
I'm more relaxed & I have found that my problem solving ability has benefitted from diving. I now can stop, breathe, think, & act.