Soo.. everyone is giving you advice to help you "overcome" this tendency. I disagree with them all ! First of all I am the same as you, but I have come to realise that finishing projects doesn't fulfill me or bring me any joy. Quite the opposite, when I finish a project, the end of the project is very boring, a lot of work, and once done I just feel empty and drained, I'm just glad I can finally stop. What brings me joy though is starting a project, learning new stuff required for that new project, all that initial phase of the project is the best feeling, I'm hyper focused, I'm in a trance-like state, I have millions of ideas and thoughts about it, then once I figure out how to do it, I slowly abandon it and I don't want to finish it and that's ok, I'm happy because I'm doing the best part (imo): learning how to do it, figuring it out, proof of concept.
If you are like me, don't listen to all the people pushing you to finish, they don't get it. Do what you like. We don't have to be productive in all our endeavours, just having fun while it lasts is ok.
Exactly.