foremost chosing a good bounty is one of the hardest part.
we cant just say it is good by looking its whitepaper or reading its roadmap because many ICO bounty right now is a scam .
Scam ICOs has always good whitepaper, a good roadmap but still it turns to be a scam, some other ICOs turn to be a no good for they didnt raised a proper amount.
so I must say just try and try till you get that good bounty

just sayin!