The things that piss me off the most are as follows. The current channel layout is a piece of shit and needs to be changed back to the way it was before the last major layout change. The fact that videos don't want to load at all (or at least not at any decent rate) anymore is annoying as hell, especially when the video freezes and you have to wait for it to buffer more. And the most recent problem is that YouTube seems to think it would be funny to make the default quality setting for every video 240p. If it was 360p that would be no problem, but 240 is an unbearable mess. I seriously think that the idiots in charge of YouTube are purposely trying to make it unusable for some sort of nefarious purpose.