I just want to qualify point #3 "It can be monetized and marketed." This was once true about 7 to 10 years ago, but no longer. There are some that work tirelessly for years hoping for a pay off at the end, the vast majority of which you'll never hear about. I just don't want people to get a false impression about their chances of producing a monetary success. If you're hoping to make money off your game and just getting started: view it as a lottery ticket.
Other than that, yes, producing games is lots of fun.