Haven't read the black company, it's been on the reading list for a while but not purchased yet, so no comments there really. The DM feels that FR books are really really good and anything more complex is stupid and pretentious. Perdido Street Station is a good example of a book he loathes because "the writer uses big words to show off how smart he is". Not sure where the Black Company series resides on that continuum. I'd be quite pleased if he were ripping off from an acclaimed book series though. Thrilled actually.
I'm not saying that having somebody under the age of 18 who is in some way abnormal makes for a terrible game. It's the out of game complaining that kind of set me off.
I've done the special NPC* thing from time to time too. Almost inevitably a certain player (oddly enough the player who's running the game now) become violently bitter and I've sighed and quietly whisked them off stage at the earliest opportunity.
*except they're always lower level than the party and conform rigorously to the NPC rules -- usually their attitude or a specific piece of knowledge sets them apart. I did have a heretic who spontaneously started to grow horns and a tail once. Said player, now DM, hated him and worked to make him his "Mage Armor scroll scribing bitch". It was funny at the time. It's even funnier/more ironic now.
Comics
The Fantastic Four. I think of Reed Richards as a main character. In my mind that's like being a player character. I don't mind having a PC who's special especially if the player can play the role well. I don't even really mind having a character who is superb and perfect. It's ability of the person in question to play the character that becomes the issue.
Professor X's first kid, Legion was great. He was practically the only mutant who actually fit the "we're tortured by our genetic destiny" bill the X-Men copped to. He wasn't good looking, his powers made him crazy and that was why he never showed up in the comics. Err. That was off topic.