Thousands of Unpainted Figures
You have tons of miniatures just waiting for a layer of paint. As a matter of fact your enthusiasm for buying miniatures really has not waned, but you just do not have time to paint much anymore. Strangely, your passion for purchasing miniatures may be killing off your passion to paint. A huge miniature collection can make taking up the brush too large a task. You need to change gears and give your self a chance. Here is a formula I have used and many others to jump start folks with giant unpainted miniature collections and no will to paint.
Sort your miniatures into piles labeled: games I am now playing, games I know I will be playing in the next month, games I love, but have not played in years but still love, and games I am no longer interested in.
Start selling/giving those piles away in reverse order until you have less than 20 models. It will be painful, but it is necessary.
Buy the best paints and brushes you can afford. Use the profits of your miniature sales to buy those new paints. Throw away or sell most of your old stuff.
Paint ONE figure at a time. Having a limited selection and a light at the end of the tunnel is often enough to get folks going again.