Thing is, no matter how much satisfaction I get from a problem solved, elegant or just effective code written, etc - it isn't quite the same thing as when I could look back at a yard/park/complex etc at the end of the day and say "Yep, that looks good. I did that." Something that not only I could appreciate, but everyone driving by would notice on some level.
I'd not want to go back to that full-time. Intellectually my work now is far more satisfying (mentally designing algorithms while walking behind a bobcat tends to result in both poor algorithms and a poorly cut lawn). And it's easy to forget the long days, paychecks at the mercy of the weather, being constantly sore and always finding dirt and the damndest of places...
But I am thinking about finding some part-time work in landscaping this year for just that reason. I enjoyed it, I was reasonably good at it, and it felt good to be doing. With my hands.