I find it annoying to cap valor in 5 mans every week, reason for that is morons who let me do their job for them.
People who die on Arlan the Blademaster in SM or whatever his name is, people who die on the kung fu panda in the dojo in shado pan fists of fury, people who drool in the water on the 1st boss in jade temple. List goes on and on.
I also do 50% of the groups damage and they won't reply to me when I ask what they are doing. They won't take advice when I tell them what they do wrong, I try to help them know how to gem gear/reforge or even play their rotation. I play a warlock and I got a fair idea about other classes dps rotation but most people in pugs barely know their own class.
This is painful to endure every week and it makes me not want to cap my valor. I get time to cap before raids, which is 2-3 hours after I get home from work.
As most guildies come on 5-10 min before raid or some don't wanna do heroics they aren't an option to force to come with me as they don't want to deal with the mouthbreathers I gotta deal with in every 5 man.
Is it THAT HARD? To read up on your class, you see a boss come towards you with bladestorm whatever or something thats lethal, would you stand in it IRL? NO, so move out and do proper dps. My rogue alt is new dinged and I can do 40k dps with shit gear, I see people with the same gear around 15k-20k.
So its really true 80% of the population have the awareness of a rock and the attentionspan of a 12 year old with ADD.