Some amazing talent here!
I've done a lot of writing. Had a weekly column in an online magazine for a number of years - really enjoyed it because I could write on all kinds of things, including political opinion. Over the past few years I've done a lot of ghostwriting. Just finished a book for a heart surgeon. I do a lot of website content, that kind of stuff. It can be boring. I just do it cuz I need the money. I have a couple of good clients, but for the most part, unfortunately that type of writing does not pay very much. There is a lot of global competition and a lot of writers willing to work for peanuts. The writing quality reflects that, of course, but if you look at the majority of the web content out there....well, let's just say it is pretty dumbed down.
My grandkids love the stories I make up for them, so I've considered putting together some children's books. I've also been collecting material for many years, since I want to eventually write a psych book. A book that requires a lot of research that will stand up to peer review is quite an undertaking, though. I'm also in the process of trying to set up my own website & blog, but I just don't have enough hours in my day (maybe if I spent less time here? LOL)
In spite of making a living as a musician for a good chunk of my life, I've never attempted songwriting. Guess I never felt I'd be good enough or something.
I agree with the others, though, that it takes a lot of work to market and sell.
Edited to add: I've written quite a number of biographies that are on sale on Amazon, many about other writers. A common thread seems to be that most of the really successful ones got a LOT of rejections before they finally sold a piece of writing. They kept at it because they loved it and believed in themselves.