Marco hasn't completely made up his mind about Crocker. On the one hand, vengeance and good taste in literature! + Open acceptance of magic and such actually speaks highly in Crocker's favor since Marco's biggest pet peeve about rookies are the ones who act like they understand the world enough to arrogantly traipse through the New World expecting it to be like everything else and finding out that no, it's nothing like that at all and then they die or get completely crushed. WHICH OKAY, Crocker has yet to shown that he's not like that, but those guys usually believe magic and shit CAN'T be real, and usually if Marco says something they don't believe it or take him at his word (which he is used to even from his own crew, but it still pisses him off)

He has NO idea that Crocker is a spazz yet, and the "free from Mother" thing actually quietly jabbed Marco in his father feels, but overall Crocker is someone who could be very interesting, or a complete nuisance. He has yet to see, but he's secretly hoping for the prior ;)