In a class I took from William Glass he said "I don't write because I want to, I write because I have to." The ideal Forever Project is that sort of topic to you; like an itch that you must scratch. If there's no topic in your life like that, fine. Maybe you're not at a point where you're ready to take up a Forever Project. Go do other things until some topic rears up and smacks you on the nose.
It's better to build something that's an expression of yourself, rather than something others think is smart.
Don't confuse "doing a thing because I like it" with "doing a thing because I want to be seen as the sort of person who does such things"
Notice that the #1 regret was "I wish I'd had the courage to live a life true to myself, not the life others expected of me." Perhaps the regret of working too hard was really just a symptom of this deeper regret.
Almost everyone I've ever met would be well-served by spending more time thinking about what to focus on. It is much more important to work on the right thing than it is to work many hours. Most people waste most of their time on stuff that doesn't matter.
In large measure becoming an artist consists of learning to accept yourself, which makes your work personal, and in following your own voice, which makes your work distinctive.
The question I want you to ask yourself is, what did you want before other people got into your head about what you should want? What were you like? What were you drawn to, what did you like to do for fun?