I suffer from the same thoughts. I cant come up with an idea of my own to save my life sometimes. So, I have gotten pretty good at adapting tutorials to subjects I am interested in. I have done almost all of Andrew Prices tutorials but not exactly the way he does.
I may not have any creativity, but I think I can build just about anything I want to so thats the approach I have been taking lately. Just building things in Blender.
I also dabble in photography and there are guys that can take pics of dog crap in the grass and people oooh and ahhh over it and I just cant see the “Art” in it. Photography helps a bit I think. Link to my site is in my sig if you want to check it out…