I mostly do only 5 man content, and almost always do LFD with PuGs because I have no guild. So I've seen some real good fails. So many in fact, that I've probably forgotten more than I remember by now......
1) In AN, final boss, tank finishes up the two stair mobs, then before anyone can say a word, him and rogue run down the stairs and he attacks the boss. 2 dps and healer standing on the outside of the fence...... This after the tank had wiped the group a couple of times. I left.
2) Oculus.......last boss. Healer only heals tank. Tank doesn't "tank" the boss. Tank doesn't pick up the boss after first Planar Shift, but instead goes around killing whelps. Group wipes 4 times, one with me getting a red drake and saying I WILL TANK, when the healer still doesn't heal me (even though I am the only one tanking). I leave......
3) PoS. Tank runs into tunnel before healer is ready. Tank dies at the midway point, leaves group. All he had to do was get a rez and finish the last boss...... 15 minutes before daily rollover......
4) Nexus. Tank afk's at the start saying "I gotta afk real quick". 5 minutes later, as we down the hall pat, he comes back, runs and attacks the first group, then afks in fight. We fight on, he's on auto follow. Comes back and says, "Just a few minutes, gotta afk real quick". We move to first boss, down it. Move to second boss, down it. He comes back and laughs saying he lived while afk (mostly due to my paly ret auto heals). Finally timer is up and we kick him and 4 man it up til the next to the last boss.
5. Random heroic.......rogue does 500dps for the whole dungeon. My pet out dps's him, and out does him on total damage done.......
And he was NOT afk.
6. Random heroic.......tank loses agro to my hunter, even with misdirect being used
7. Every damn PuG in PoS that thinks they MUST run up the hill and skip the first group. Always a wipe. Always. So I waste the time, the repair bill, to do what we should have done to begin with......thanks Mr. Tank (who think PuGs are good place to expect results when glitching a well known fail point in a dungeon). Oh, and kill the damn casters first, thank you.....and if you could, help with the interupts.
I love this game, really I do