For the king of beasts, your home is your castle - or should that be den? It has to be large and comfortable, with high-quality furnishings, because you can't abide anything second rate.
Brass fittings and knobs speak to your passion for gold. Big windows and skylights bathe you in natural light. If you live in a cloudy climate, you might need full-spectrum light bulbs to mimic summer sunlight year-round.
You aren't afraid to add chairs or accents in red, yellow, or orange. And plenty of mirrors will help illuminate the space, and... well, you're Leo, after all!