2b/2b (or 1.5 bathrooms) hits a sweet spot because it can give you/a spouse a private bedroom and bathroom, a separate bathroom for guests or a child/spouse to use, and a second room that can be a bedroom, guestroom, office or hobby room. It’s also a layout that can work well at 900-1100 sqft, especially if it’s not a ranch layout with a hallway eating usable space.