I'm watching a lot of anime right now. One Piece, HXH (2011), FT, Toriko, Naruto. Magi, Code Breaker, Tonari no Kaibutsu-kun, Pyscho Pass, Btoom!, K, Kamisama Hajimemashita, Sword Art Online, Little Busters, Zetsen Tempest, Sukitte Iinayo. This season's anime line up is definitely the best
A lot of changes happened within the Shichibukai. Two of them were defeated by Luffy. One got himself altered. One quit after gaining two devil fruits. One quit for the sake of friendship. The new members haven't been revealed. But, even with those changes, Mihawk is still the most dangerous. And Buggy is the least.
Monkey D. Dragon, Luffy's father. He is a the leader of the Revolutionary Army, and when you're the leader of a LARGE army like that, you have to be strong to command exceptional fighters like Bartholomew Kuma (before he changed). He is also a D and D's are obviously strong. And if he has HAKI, w/ch I believe he has, then. . . . .
Depends. The anime (in my opinion) of HXH is definitely better than the manga. But, the mangas of Bleach, Naruto, OP, KHR and FT are better than the anime
It does have serious arcs. Benizakura Arc (58-61) The arc where Kagura's biological brother appeared (forgot the episodes, but I think it's longer than the Benizakura arc) There are few serious arcs other than these two.
I prefer subs because the emotions are there. Dubs, most of the times, sound dull/plain. Most dubbers suck! But, I prefer the dubbed version of Samurai X than the subbed one. Kenshin's voice in the latter sounds too girly for me.