About hxh, i heard its a long series and i got back into anime/manga recently. I cant comment on story/depth of it, except that the chars/art, from the little ive seen, are not my taste (remind me too much of early db with main chars resemble a kid etc); i heard from many tho that the story is worth reading/watching so ive been tempted to start digging into it, just havent had the time yet, but i prolly will soon.
As story developing, char progression and backgroun, tokyo/akame are imho on par with mahouka (opinion formed from reading the manga for both). Cant comment on aldnoah/zankyou cause they just have 7 anime's episodes, so its too early, but so far, always in my opinion, anime wise they are all on par.
Yeah the main char of tokyo ghoul really start as being rly pathetic/crybaby annoying. I kinda hate that sort of characters too, but he is going to do almost a 180 degree change during the aogiri arc, which supposely shud be the next (hopefully). That is why ive said before i really hope they conclude with that arc (in the manga, the arc is pretty deep on the story, anime is being faster), otherwise there was really no reason to make an animated version of this story.
What id really really really love is an animated version of the breaker/ tower of god and feng shen ji... even tho i doubt it will ever happen.