Assuming I spend half my time at work using a keyboard (probably an underestimate) I've spent in excess of 20,000 hours using a keyboard.

There are very few things I've used more, maybe my mattress? Office chair? My shoes? Not my car, not my bike, none of my 'real hobbies' that I get to enjoy for an hour a day or maybe two on a weekend. And I don't want to get too real, but I've probably touched my keyboards more than I've touched my wife, and now I'm sad.

There are certainly "collectors" who get a kick out of just spending money to line shelves with a variety of objects on display. I also don't understand that. But keyboard hobbyists are typically also typists, who use their keyboards, and try new styles frequently to find the best tool for the job they spend most of their lives doing.