What you care about and makes you happy doesn't really matter. What's important is why those things matter in the first place. Starting with that "why," rather than "what," could help you find better and more meaningful ideas.
Simon Sinek, of Start With Why, explains how it's more important to focus on why you're doing something than what you're actually doing. Your why is your purpose, cause, and belief—it's what's driving your motivation for action. If you can articulate why you're passionate about an idea, you can use that ability to facilitate interest in your idea. Sinek explains further in his TED talk:
One of the things Sinek talks about is that why is where gut decisions come from. In that context, the whole idea of starting with why—the more philosophical, abstract, and emotional part—works very well on a personal level. Why as a starting point is essentially creating a beginning based on a feeling that's strong in you. You could want to create something different than anyone could ever anticipate or imagine. Perhaps you're angry with the way many things work. You could also have an intense desire for peace and calm. Starting with that feeling is your why when you're looking for an idea. How you can make that abstract feeling more concrete is how you can use your why to brainstorm new ideas. In this equation, what is simply the result. Rather than starting with what, you can instead generate it by first deciding why you want what you want in the first place.