Considering how fragmented the series has been regarding its focus on characters, i would say it is too early for any type of character polls. We have barely started to learn some more background information about some of them (while still not knowing anything about others), so i would say waiting at least a couple episodes would be a good idea. Considering it seems we are starting to dwell on the characters a bit, i feel the next few episodes might prove a much better ground for discussions than the situation is now.
One thing i can promise is a favorite character poll around episode 12-13, and a second one after episode 25. As for "underappreciated" character poll - that might be a good idea in a week or two, will likely create it then
