Most of the time the ideas that seemed good felt not so good after sometime, other ideas that tried ended up failing to gain traction and ended up in GitHub or dead files folder.
Don’t be do hard on yourself since contrary to the conventional wisdom here, true good ideas are rare [1].
So are you looking for startup ideas or just project ideas?
Yah the thing is even though you think it's a good idea you never know until you try it only after trying you realize it's not a good idea after all
1. https://www.tillett.info/2016/01/27/a-good-idea-checklist/
Apart from your comment being totally against the ethos of HN, how exactly am I making a living out of my personal blog?