Earnest Engineer

So I've built some cools stuff as a software engineer - applications with voice response, telephony and vision technology, web applications and GUI front-ends for medical devices. But I've had conversations outside of work where I've told people that I make software for a living and they excitedly say "Oh! Are you an App developer?" and then display the littlest bit of disappointment when I tell them I develop software for medical products- "oh well, that's nice too". So in my efforts to make it into the big time , I'm delving into the world of apps. I recently became the proud owner of a Nexus 7 - since I'm way too cheap to pay for a Smartphone. This will, of course, affect my choice of platforms for my app. And as every designer, business analyst and marketer would point out, the platform doesn't matter. What you build is what matters. What problem gets solved, what human needs get fulfilled, what "niche gets scratched"? Tha