What is a good bounty campaign to you? Solid projects with promising tokens, plus an interesting bounty pool (in terms of its volume, of course), plus robust bounty management. Right? So basically, here's how you can start off, based on those critera. Find good projects (it's always better when you trust a project, believe in it and really want to support it the right way), compare bounty pools, see how they are managed (usually you can notice that quite quickly if you take a look at how rules are written, spreadsheets done and answers given).