These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
It Gets Better: The first few volumes are pretty slow and read a bit like a Rurouni Kenshin clone. Still enjoyable, but not extraordinary. Then the real plot with the Mibu hits, and we have a real show on our hands.
Jerk Sue: Kyo in spades: He's killed a thousand people just to prove his strength and doesn't show any remorse whatsoever (on the contrary, he's proud of it), he verbally abuses almost every single person that surrounds him on a regular basis, he gropes women at the drop of a hat (specially Yuya) and he shows no respect for almost anybody. And yet, all of his companions treat him as an incredibly admirable and honorable person. Sure, he's supposed to be a Jerk with a Heart of Gold, but his "heart of gold" moments are arguably pretty weak, few and far in between.
Designated Hero: Kyo's jerk tendencies put him in this category for a lot of readers.
Magnificent Bastard: The Former Crimson King, certainly. Others may qualify, like Nobunaga and Yukimura.
Iron Woobie: Hishigi. Think about Hishigi for a second. He is in constant, excruciating pain from the Devil Eyes and the Death Disease. He has watched countless friends die horribly while he was helpless to save them. But he keeps fighting for Fubuki, because Fubuki is all he has left. Damn.