What I've found difficult to navigate is that while it feels a little like the joy of programming your old C64 (or in my case, Osborne 1), the truth is you're putting your work out there and it suddenly becomes open to both harsh criticism and support expectations - even if you're giving it away for free, without advertising.
My app is for film-makers, and it's called Acacia (https://market.android.com/details?id=com.ephemerald.cameraa...), and I'll fix the bugs when I have time :)