Famous trad author says: "Write what you love, success will follow."
Yeah, okay, dad...
Famous indie author #1 says: "You must be intentional. To give yourself the best chance of success, you must pick a (sub) genre, write in series, and stick to that genre and series and keep putting out books."
Famous indie author #2 says: "You better love what you've written and what you've put out there on the market, because if it takes off and is successful, your audience is going to want more, and your wish to make this a full-time career is going to compel you to keep giving it to them. If you don't love it, you're going to find the whole thing a massive grind."
Believing the famous indie authors are right, I say: It sounds like you'd best figure out what you want your author brand to look like, what genre you want to be known for, what series you want to write long term BEFORE you start writing.
Okay, fine... but, what if you're just like every other author on the planet and have a notebook full of "brilliant" ideas and premises? How do you pick when knowing what you're picking is or should be the thing you're hopefully going to build into the thing (genre, series) you're known for and upon which you're going to build an author career?
How do you pick?
Flipping a coin, rolling a die, eenie meanie... these seem like pretty silly methods when you're talking about choosing the path by which you're trying to define yourself as an author interested in eventually going full-time.
How did you do it? How did you finally realize what you wanted to BE as an author and indie publisher... as a brand?
You just started writing whatever and it worked out? Please don't tell me that's what it was. Or were you intentional? If it's the former for most of the successful indies then, well... that's depressing.