What are you passionate about?

[Arthur Dent]

Just thinking about people who are really passionate about stuff. Like music, their profession, a sport, hobby, etc. Some people have huge collections of stuff that they treat like holy relics. Some people spend every possible second practicing a sport or an instrument or something.

Is there anything that you are really passionate about? Something that is so fundamental a piece of your life, that without it your life would be far less?