New Weekly Shonen Jump issue has announced the 5th Official Characters' Popularity Poll.
I don't know more details becouse I can't translate the scans (maybe Aohige or CCC can translate them and explains us how poll works) but I think we will have the results in October-November.
You can see the results of the other Popularity Polls here.
We can vote for our favorite characters while we wait to the official results. How about if we choose our 15 favorite characters?