obsession

An obsession is an all-consuming interest or idea that takes over someone's thoughts and actions. It can be a hobby, a goal, or even a person.

When we talk about obsessions, we usually mean something that someone feels strongly passionate about, but might not always be in control of. For instance, you might know someone who is obsessed with collecting rare vinyl records, spending hours each day researching and searching for new additions to their collection. Or maybe there's a friend who's obsessed with learning how to cook the perfect sushi roll - they spend every spare moment practicing and experimenting with different techniques.

In both cases, being "obsessed" doesn't mean it's necessarily a bad thing! It just means that this one thing is dominating their thoughts and energy right now.