*Joins
I haven't gotten around to watching Kai yet but I will soon. I scored Ni 9/10 which as well, i loved it.
My favourite arc would probably be the the first arc of the series, it had everything. I remember wondering what the hell was going when everybody died at the end of episode 4 ^_^
^I would usually spoiler tag that but everybody that knows Higurashi knows that everybody dies, a lot.