Alternate Character Interpretation: Ironically (and interestingly), Lancer is one of the few Grail War opposing participants Shirou has both a relatively good opinion of and who he doesn't condemn for his actions. Compare those GB reckons Shirou must dislike: Shinji, Gil and Kirei are pretty much his mental Butt Monkeys, the former two so disliked they're the only people he'd not feel sorry for if they had Homura's condition (though in Shinji's case Shirou notes that it would be somewhat of a karmic punishment.); Rider he didn't see enough of to see her good sides; Archer he considers to be trying to haunt him; and for Caster, he reserves a Precision F-Strike. Just try not to think too much about some of these opinions - particularly Shinji and Caster - may or may not contradict canon, because you may get an ulcer, and Gabriel Blessing is not the kind of person who bothers to go back and rewrite mistakes or revise chapters (he didn't even edit the sparse few uses of 'Akizu' instead of 'Akitsu' in Chapter 2 for goodnes’s sake, even though he did correct the spelling thereafter).
Angst? What Angst?: Shirou and Musubi are both disturbingly chipper and blase about the horrific near-death experiences they endured in childhood. The people around them consider them "distorted". Shirou is freaked out by how cheerful Musubi is when she says that she was dissected as a child and wonders if that's how other people feel when he talks about the fire.
The Twenty-Eighth Wing divided the fanbase between those who thought it was a small slump in quality (having come after a hiatus of four months) and those who consider it perhaps the weakest chapter to date (forvariousreasons). The story itself becomes that much more divisive as time passes, really - almost anyone thought the early chapters were excellent, but as the particular type of story becomes clearer to them, more of them are dissatisfied.
The whole "Emiya Clan" deal - either you love it for the Memetic Badass Shirou, or those reasons make it the worst thing that ever existed. Given that even GB has admitted that he tries to avoid Shirou being invincible (whether he succeeds or not is a matter of opinion), there will never be a single opinion about the fan-made concept.
Chapter 41 has led to a mass exodus of readers from the fic, many having seen Shirou's reunion with Rin and Saber as underwhelming and the conclusion, with Shirou winning the battle with Saber far to easily, and defeating Rin using what, in Sekirei canon, amounts to a joke technique note albeit one he had originally expressed interest in obtaining due to the possible uses it could have in combat in chapters as early as chapter eight , followed with him geas-ing Rin into never being able to see or interact with him again in order to prevent her from chasing him, then promptly followed by him waking up a few days later almost completely healed, and despite the fact that he had just broken up with Rin and Saber not three scenes before, immediately having sex with Kazehana all while gushing about how his relationship with his psychic alien girlfriends is so much more fulfilling than his relationship with his old girlfriends, not even minding the fact that Rin and Saber will both probably become self-destructive wrecks having been abandoned by him as the straw that broke the camel's back. Their reconciliation with Shirou in the final chapter has softened the opinions of some detractors, though.
Harsher in Hindsight: Miya says that why Shirou can't do something for her to properly punish him. Well, when she finally does so, she's been blasted thorugh a wall by a Fraga clan member and half of Izumo is torn. Could count as Hilarious in Hindsight if you're mean or just don't like Miya.
Since it hadn't been revealed yet, Gabriel Blessing guessed that Akitsu was meant to be #7. This is later revealed to be canon in the manga.
The same can be said about his guess on Kochou's abilities as he guessed she was another "brain type" Sekirei, exactly as she turned out to be in canon.
In story, Shirou makes a whiteboard schedule chart so that each of his Sekirei has a chance to eat and sleep next to him, with some claiming the may even "Double-up. A two years and change later, How a Realist Hero Rebuilt the Kingdom would be released where the titular isekai'd hero is told he can only eight wives for the same reasons and the soon-to-be wives also making the same suggestion of doubling up.
As of the 27th wing, we learn that the male Ashikabi of MBI Disciplinary Squad Sekirei has taken a romantic interest in Shirou; particularly after he learned that one of Shirou's Sekirei is (or is it was, now) male.
Rescued from the Scrappy Heap: Shirou's previous landlord. In the manga he was a gruff and unpleasant old man, who kicked Minato out of his room almost out of spite. In the Fan Fic he turns out to be a relatively decent though still gruffy fellow, giving Shirou a week to find a new place, offering him a job with good pay, recommending him to his fellow landlords, and even paying him more than they agreed on. The fact that Shirougoes out of his way to help the landlord probably helped.
The Woobie: Akitsu. Since winging is a "mating ritual", as Shirou put it, being a scrapped number means that Akisu can never find a true "mate" for herself. Considering that the Sekirei believe the person who wings them is their soulmate, this essentially boils down to her thinking that she will never be able to find love. Thankfully, Shirou was there to help her out.
