Extended combat sequences where you can't even imagine what's happening

Too much description, esp in a novel more than graphic novel (cos you can draw it then)

When a character goes to a ball/dance/party or simply out the door in the morning, I don't need to know the exact embroidery pattern, pantone shade and where every fold falls in their outfit. Yes it's nice to say "she was wearing a blue gown" or even "a powder blue gown with heart embroidery" if you must but "the bodice was curved at the top in a sweetheart neckline, it came to a perfect point at her waist, the colour was the blue of the sky on a summers day and featured styalised hearts on the skirt, which swopped and shifted perfectly as she moved. The silk was so luscious she might as well have been dressed in liquid silver" no just no.

Time skips and like battle competitions.
Time skips are confusing, and everyone does damn battle competitions and it's just plain annoying.

OMG THIS BOOK IS SO FUCKING DEEP BECAUSE LIKE THERE'S BLOOD AND SHIT AND ITS RATED M AND BOOBS

Seriously, some books that are rated M should never be used for anything other than ass wipe.

Ooo! Pet peeves! I love listing my pet peeves!

- Sluggish artwork
Like, where the characters are drawn a little too realistically; lines in the faces are so emphasized that young adults and even children look elderly; and all of the movements look posed. "Watchmen" comes to mind.
- Never-ending series.
I personally prefer one-shots, but a series can be good to, so long as it still has a beginning, middle and end. I hate when the series goes on so long that it gets repetitive, and no "big change" means anything anymore, because everyone keeps dying and coming back to life, getting married but then getting divorced, turning evil/good but turning back, etc.
- Writing styles that spend more time trying to be poetic and use fancy words, than trying to build an image in your mind.
- Books by male authors where the heroines are strong, tough, no-nonsense, independent, and smart...but always outrageously gorgeous looking and in love with the hero (unless they're evil). This cliche is an epidemic in the cyberpunk genre.
- "Adult Fantasy" novels that are just "Lord of the Rings" ripoffs packed with sex.
Look, they already made a brilliant, classic, LOTR porno, and it's called "Lord of the G-Strings." No one can possibly do better than that movie did, so all these authors should stop trying, and go write porn versions of other epics that haven't been spoofed yet.
- When a horribly boring character is given his own subplot, so the author can show his fantasy world from an "average person's" point of view. Guess what? NO ONE COMES TO A FANTASY BOOK TO READ ABOUT AVERAGE PEOPLE.
- When the author delves into great detail about a world we've seen a hundred times before in more famous works. If your fantasy or sci-fi world is really new and different, I'd love to hear about it. But if it's just another Middle Earth or Sprawl ripoff, I don't give a frak.
- When the author flat-out refuses to describe his characters, or even give us their ages. (I say "his" characters because, interestingly, I've only seen male authors do this.) It tells me that the author just doesn't give a crap about his characters, and is using them either as plot devises, or as Mary-Sue shells.
- Being told who I'm supposed to be attracted to. Of course if a character is in love, he or she will think the best about whoever they're in love with. But I hate when EVERYONE is attracted to the same person, because real people have different tastes.

Female characters that show up only to be love interests, and then die afterwords.

Overpriced comics with too little pages and to many volumes.

Walls of text.

"Telling" and not "Showing"

Undeveloped characters.

I hate it when the number of graphic novels exceeds the 40s.

I hate when it feels like the author really wants you to like/hate a character, but hasn't put in the effort to construct them in a believable way.

Over use of tropes. (Hunger Games, anyone?)
Flat characters.
As for comics, my biggest is bad art masquerading as style. Making the shoulders four heads wide is not style, it's bad art.