Fly professionally for the money but still instruct for fun !!!
Always come home from a days instructing with a smile on my face, I love passing on some of my knowledge and seeing the face on my student as I send him off on his first solo etc ......
The GA instructing world is 'FUN' !
I fly nice shinny jet's for the money .... but its like wearing a straight jacket compared to flying in the open FIR in a spam can ........ (Don't get me wrong, airline flying is a great way to earn a living - but it is work !).