This is not a conclusion I would jump to easily or quickly, but I have/had similar problems, and ended up being diagnosed with ADHD. I take medication now, and

This is not a conclusion I would jump to easily or quickly, but I have/had similar problems, and ended up being diagnosed with ADHD. I take medication now, and it makes a huuuuge difference with 'procrastination' and problems finishing things (and many other things too) That being said, you describe this as a 'subtle' problem - in my case it was intense, and causing huge life problems for me. I can't diagnose you no matter how much information you give me, but it might not be a bad idea to talk to a psychiatrist or a (properly qualified!) psychologist? You could also do some research on techniques for coping with ADHD - most of the techniques are common-sense, good practice, and if you don't have ADHD they'll be even more effective than they are for someone who does have ADHD.