On the A grade/B grade comic thing, this is just how I look at it: There are so many A grade comics if you look in the right places, and are into a diverse set of genres, publishers etc., I would never need to buy a *B grade book* as we're calling them, or books that are fine disposable fun in my mind.
I understand the place those books have in the market eg. some will consider them A grade due to their own personal preferences, or people will recognise them as B grade but want that escapism, but for me, there are too many good books in the first place. Between Image, Dark Horse, Vertigo, Oni, the big two and so on, and given that I like many genres and writing styles, I literally never need to buy a fine or even good book. I can just buy 30 books that obliterate my mind and know I'll come back to them for years and that I've hit what I'm willing to spend on comics.
If I had more money, or less other needs such as other hobbies like games, or going and doing thing in real life with my girlfriend and kid, I probably would keep going and buy books that are *B grade* too. As it is, there are so many top quality books out, I have no need or place on my book shelf for disposable fiction that I might read and never come back to. This is a pure preference though, and not something I assert that everyone should be doing. If you want to buy a book regardless of it's reviews because it has that green lanter you like it in, or the artist draws some really nice T n A, or anything reason really, that's fine by me. I'll always advocate what I think is a real literary experience first though, because that's what I go in for, books that will change how I think about fiction, or life, or whatever. Books that change me.