Passion is commitment. You strive to understand every single detail of how to be better at that thing you do no matter how miniscule. You are willing to seek it out at costs that most can't fathom. You don't sleep much because that's time away from the pursuit. When you do sleep, your brain is post processing ideas that will eventually become the inspirations and breakthroughs to fuel the fire. The beast needs to be fed with study, practice, experiments and experiences. It's an addiction you will never shake.
Passion has no space for stuff. The only material objects you accumulate are tools, equipment, references and notebooks in the pursuit of excellence. Some pieces have exceptions due to fond memories of who handed it down to you, that feeling of accomplishment when you first picked up a new skillset, where you discovered it for the first time and the list goes on. You can live without things because it's the knowledge that fulfills. That's the stuff you're made of.
Passion overwhelms. You've experienced the glazed over look when you can't stop talking about a new discovery when someone asks. You have a religious schedule that cannot be broken by just about any occasion. People who know you well enough don't ask you to party. Your significant other has given up on asking you to come to bed if you have one at all. It's not for everyone.
Passion connects. Most everyone in this camp is open to different perspectives and has a willingness to share experiences. It's just about impossible and ridiculous to become proficient without guidance. All you have to do is show true interest and it will open some serious doors. They're all doing the work here and you won't be disappointed. It's the family you've been looking for.
Passion yields identity. All the hard work, perseverance and stress brings your biggest obstacle to the forefront, yourself. You gotta dig deep and deal with those demons. Discovering who you truly are is where this path is headed. You only have a limited time here so make it your own.