I do not have any favorite managers. What would not be a popular and professional manager, most likely he will have a scam projects. I love when the company is being by the developers
I prefer the bounty the German Manager is the official project. Because it might be more of a focus to take care of a bounty. So it can be more responsive and is also active in the bounty.
There are a lot of good bounty managers that I am participating right now like yahoo, Sylon, deadly and many more. I assure these are the legit to participate from different campaigns.