It’s Not A Hobby Or A Dream
There should be a purposeful word choice in what you use in a sentence. With this logic in mind, ‘Passion’ is as far from a ‘hobby’ as a ‘hobby’ is to a ‘dream’. One special ingredient separates passion from the two. In the 2004 movie, National Treasure, treasure hunter Benjamin Gates asks his sidekick, Riley, this simple question: "We don’t need someone crazy. But one step short of crazy, what do you get?"
His sidekick says "Obsessed" but he corrects him with "Passionate."
When you do what you love to do at a moderate level, you can call it a hobby. It could be cooking, gardening, singing in the shower, disassembling gadgets, playing with action figures; the mix. But when you go all out with it, to the point that someone deems you a step short from crazy, that’s passion for you.