To do indie or to do Mario

[Kritter]

Also depends what market you want to go for with indie games. Making indie games for the IOS and Google Play stores for example can be a good bit of money if you can get an idea that appeals to a lot of people and is relatively cheap to do when compared to making games for Steam or Consoles, but it's also a crowded market no matter what game you're trying to make and I've seen PLENTY of indie games go basically unnoticed.

You really need an idea that makes your game special and the passion to make it happen. As Jonna said, doing it for money isn't really enough. If you enjoy making fangames then do that until you're ready to branch out and take that enjoyment in an original direction.