Some come and go. The projects that stick become hobbies. If it doesn't stick at least for a brief moment you were dedicated to something new, and now it's filed away into your shallow knowledge of everything. The hobbies that you do constantly for months those become your passions.
Passions are nice. They're comfortable things you always can go back to. You unwind with a former hobby that you can do without thinking, and instead ponder your day.
But for me, it isn't about the passions or even the hobbies, though I love the ones I have. It's the projects. The things I spend hours combing the internet for. Books for "dummies" that never quite reach that "reference for the rest of us" level.
I pick up new projects all the time. The moments when I'm not speaking, I'm thinking about my next project. The new bike I want. Swimming on a regular basis. Fantasy basketball, and learning a new sport that I have little knowledge about.
So I'll keep my passions and hobbies. But I'm always searching for my next project.