So I've been working through the Horus Heresy series, after starting about a year ago, and am thoroughly enjoying it. The deeper insight into the Adeptus Astartes is fantastic, and the writing in the codices (in my opinion) totally pales in comparison.
But the reading has lead me to an interesting question, which I thought I'd get some opinions on:
Which Legion/Chapter sacrifices the most?
By that, I mean to ask which legion requires its initiates to give away the most, or suffer the most hardship. For example, I suspect many will say it's the Blood Angels, who, by accepting the geneseed, accept that they will inevitably succumb to the madness that is the Black Rage. Others may take a different view, and say it must be difficult to be a Space Wolf, playing the role of the Emperor's attack dog, doing the jobs no one else wants (e.g. the Wolves attacking Prospero following the Thousand Sons' ignoring the rulings from the Council of Nikea.)
So, what do people think?
(I'm probably more interested in the 9 loyalist legions more than later founding chapters, but feel free to suggest whatever you like).