For me, there's just nothing like getting your hands in real honest to God dirt. Even though I know my wife would love it if I would get into hydroponics (it'd make the house a hell of a lot cleaner) but there's just something so magical about cannabis growing in soil.
Since I don't get caught up in all the measuring of pH, EC, runoff, various and assorted fertilizer ratios for various periods of time, etc., I find cannabis plants teach me more than any school ever did.
You learn how to take care of what takes care of you.