There are many good bounties that are going on right now. You just have to check it on the bounty thread. You can try Gemera token bounty, or the bounties handled by Amazix, Sylon , Wapinter or Blockeye.
Up until recently i would recommend amazix bounties as one of the best, but that is not the case anymore. MOBU bounty has left me disappointed, after everything was altered at the end of the bounty. Ether payouts were promised, and were not given at the end. MOBU is putting the blame for the poor results on the bounty hunters, and it is the same as blaming billboard on which you put your commercial for the poor placement of your product on the market. In reality you are to blame for poor analysis of the market you are in.