Brothers, think less, do more. We are all working on independent development, some friends have no ideas and are distressed. Others have too many ideas and are also distressed, not knowing which one to tackle. Here's the unpopular truth: regardless of which you do, you might succeed, or most likely not. Given that, if you're interested, just go ahead and try them all. It won't waste too much of your time. Who knows, you might just succeed with one...