Imperial Fists. The Son of Horus got about all the reasons for the two Chapters, but I dunno why, I have took a disliking to the Crimson Fists. What I like about the Imperial Fists is they are the stalwart defenders of Mankind, the Sentinals of Terra. Their Primarch is badass and I love their colour scheme when pulled off correctly, but sadly I often come across armies of Imperial Fists with badly pulled off paintjobs. Well, thats my reasons, good luck whatever you pick!