I dislike how predictable the plots are. Seriously you'd think there were only 3 story twists you could choose from =/

I tend to dislike yaoi without any actual plot. I mean yes, if I'm looking for something with lots of sex I'm more lenient, but most of the time I'd prefer a story with actual... substance. And it's very annoying when the seme and uke roles are played in the extreme where the seme is a dick and the uke can barely speak a sentence without blushing. Not to mention bad art ruins the whole thing.

I haven't watched any yaoi movie yet (didn't find any)

But I can complain about the images I've seen so far:
There are too many Yaoi Images which are drawn very bad. And often there are charakters which dont have any muscle, just a very small dick and dont have a cute face. :/

I personally dont like how the yaoi boys always have to go through the butt.

2. The yaoi-crazy girls (ones who will not shutup about it)

3. Cum (Cum really grosses me out in a picture x_x Looks like milky saliva)

4. The only yaoi doujinshi I can get is usually in Japanese ;-;

5. Usually when I type in "ninja yaoi" I get Naruto pictures, and I hate Naruto

That is all ;-; (Please don't kill me for saying these things.."

6. Shota

7. Futanari!!

sorry for double post

I'm glad to see I'm not the only one who has the pet peeves that I do! Mine are:

• Whiny ukes - seriously. STAHP. I like yaoi because I like seeing two men with each other. Sometimes sissies are cool, but its a way overused archetype and I just really dislike it. Along with this, the "pure, virginal" uke stereotype is really lame and overplayed. I'd love to see a power bottom uke for once! Or at least someone who isn't confounded by the concept of intercourse.
• Ridiculous bara - there's a point where bara stops being bara and just becomes legitimately insane.
• Glorified abuse - I really hate how abuse is glorified and translated as acceptable behavior in yaoi often. The cold seme types who don't seem to give two craps about their significant other. The ones that do as they please with the other without the person's full consent. The mind games I'll often see semes play. It's all abuse and it's not okay! I wouldn't mind if it was just present in a few things, but it's so prevalent!
• Censorship - That little black bar they put over men's privates drives me up the wall. What's the point? "OH GEE I WONDER WHAT IS UNDER THAT BAR HMMM??". Like, I understand Japan has strict censorship laws, so it can't really be helped, but it's just such a dumb, little detail. Pixelation is pretty standard, at least it seems like the person tried, but it still sucks because we all know what's beneath the pixels and not being able to see it just drives me further up the wall. I think the most pathetic one is the "invisodick" kind of censoring where there's just nothing there.
• Characters being way OOC - I know people have the right to depict characters how they want in their own work, but to me, if a character is way OOC, what's the point of even having them there? Why not just use your own OCs instead of trying to shove already established characters into your cookie cutter mold?
• The lack of content - For this, I'm thinking mainly of animated content. I know there are more factors into this than "I wanna make an animated yaoi lets do it", Japan is pretty prude and there is a lot of financial stuff to consider as well. It just sucks. If I looked up regular, het hentai right now and tried to find something animated, I'd be met with thousands of options. It sucks that there are so few, legitimate, animated yaois out there! Amongst the minority of M/M that gets animated, most of it is vanilla as heck (the Gravitation anime), "hides" the actual act (Koisuru Boukun, Ai no Kusabi, Junjou Romantica), or is very short (Sex Pistol OVAs). Heck, we're lucky if any actual romance occurs and isn't just implied like with Togainu no Chi. Of the three actually explicit pieces of yaoi animation I can think of off of the top of my head, two of them are shota (the Boku no Pico series and the other one with the maid guy) and censored. Then we have Sensitive Pornograph, a true treasure. Actual, animated yaoi with sound and even a plot.