I'm slightly embarrassed to say I've never thought to check for this before, but how about looking at things in terms of publisher breakdowns? The chart that follows is sales (all categories) broken out by publisher.
However, this just a quick report, so we have to caveat, a little: all of the "publisher" field data is straight of what comes off the Diamond monthly data dump. I generally ignore that field in day-to-day operation, so if there are mistakes there, I can't help ya' pardner.
Diamond also has a few.... odd naming habits. Eros and Fantagraphics are split, for example. There's a few more oddities in there as well.
This list will only show the first 79 pubs, those with an arbitrary 0.1% marketshare -- there are 169 other publishers who have had a sale in my store (actually, way way way more, since I don't put any data in that field for mini-comics or other over-the-counter transactions) in 2011 that I'm not showing you. Those other publishers represent about 2.5% of my overall sales.
|DARK HORSE COMICS||7.6%|
|DRAWN & QUARTERLY||1.8%|
|AVATAR PRESS INC||1.4%|
|TOP SHELF PRODUCTIONS||1.1%|
|ARCHAIA ENTERTAINMENT LLC||0.9%|
|REBELLION / 2000AD||0.7%|
|:01 FIRST SECOND||0.7%|
|ONI PRESS INC.||0.6%|
|IDEA & DESIGN WORKS LLC||0.5%|
|HARPER COLLINS PUBLISHERS||0.4%|
|ARCHIE COMIC PUBLICA||0.4%|
|VIZ MEDIA LLC||0.3%|
|HEAVY METAL MAGAZINE||0.2%|
|Little Brown and Company||0.2%|
|HILL & WANG||0.1%|
|HOUGHTON MIFFLIN HARCOURT||0.1%|
|THREE RIVERS PRESS||0.1%|
|DIAMOND COMIC DIST--ENGLAND||0.1%|
|RED 5 COMICS||0.1%|
|SPIEGEL & GRAU||0.1%|
|KENZER & COMPANY||0.1%|
|EVIL TWIN COMICS||0.1%|
|EAGLEMOSS PUBLICATIONS LTD||0.1%|
|AMAZE INK (SLAVE LABOR GRAPHIC||0.1%|
|THOMAS DUNNE BOOKS||0.1%|
|ATOMIC BOOK COMPANY||0.1%|
Here's one more chart, even more suspect.... "Genre". This category is 100% pure Diamond, and is NOTHING like how I'd design a similar check, but it's a onestep output, so I ran it.
(Optic Nerve is "Reality Based", while Archie is "Humor", Akira is "Science Fiction", and Bone is "Fantasy", Y The Last Man is "fantasy" while Preacher is "Horror" )
The Diamond lists are REALLY screwed up, though, cuz I went to see what, say, "anime" might be, and Diamond had things like "Negative Burn, Very Best from 93-98" and "Flight v2" listed with that as a category, which suggests that mostly they're mistypes from a data entry department that isn't paying a lot of attention when they're trying to select/paste/whatever on "Anthology".
("Seasonal based" on the other hand, appears to be the 2 cases of Justice League Pez that sold through the year)
Anyway enough carping, here you go:
|No Genre/All Genres||0.3%|
As always, I welcome any comments you might have!