My "projects" folder on my PC is scattered with numerous projects that I've started and never finished. These range from games, tools and webpages - written in every language that I found an interest in.

I think you're right in that it's the journey that matters to some, not the destination. As I've gotten older, I feel less pressured to finish these side-projects.

When it comes to actual day-job work. The final 20% of a project is always the hardest for me. As I just want to move onto the next great thing. The last 20% is always the worst part for me (testing, bug fixing, documentation). It's what they pay me for though :)