Bounty with a long duration and has good quality, despite the long duration, for me is not a problem. However, we must definitely pay attention to future project potential. For those who hate the Bounty project long duration because they are disappointed at the end of the project does not get a payment or fake project.
When many projects are fake, I personally prefer a project that has a short term. So if the project fails, I'm not too disappointed, and don't waste much time.
Personally I only prefer bounty 4-6 weeks, which is a sufficient time to promote the project. If bounty runs for 3 months or more then we should consider carefully because they are trying to raise capital from the community and most likely they will fail