Just for around the house or in the garage or both. I guess my use cases would be charcoal fire gone wild, grease fire in the kitchen, or chemical fire in/near the garage. I do a decent amount of stuff that use fire, flame, or sparks and would rather be prepared. Guess that mindset comes along with getting older. I'm looking primarily at a 5lb, maybe supplemented by a 2.5lb. One of the Amazon reviews for a 2.5lb recommended avoiding extinguishers with plastic components- I thought that was sound advice.
Fwiw, I'll also be getting fire extinguisher training at work.