"It is not fun to work long hours of anything, and it is even less fun when something you used to do for entertainment turns into a chore."

This is exactly why I quit photography: it was a passion in which I indulged in my own time that became a job when I didn't say no to friends (and then their friends, acquaintances, and sometimes strangers) who wanted me to photograph their wedding or similar "on your feet 12 hours" types of events. Fortunately I have this programming thing on which to fall back. :-)