I've mentioned before that I got turned on to in-game accomplishments with the introduction of the new achievement system. I had a great deal of fun accomplishing achievements on my Shaman, but as time has gone by and I've started investing more time into my other two characters some of the achievements have become harder to get. Particularly some of the holiday achievements like "Tis the Season" which requires you to loot a holiday hat from bosses in various instances. As with the "Sinister Calling" during the Hallows End celebration, I've been very unlucky. I've failed to loot either the Sinister Squashling for two years now, and I've yet to loot a holiday hat on any of my toons either. Which of course means I can't complete either Hallow's End or Wintervale world events, and can't progress toward the "What a long, strange trip it's been" achievement which awards a purple proto-drake mount.
I know Blizzard has answered criticism on this very point during the Hallow's end event, saying they meant the achievement to be harder than others. But as I've already said I failed to loot a Sinister Squashling for two years now. Last year the achievement system wasn't in place so I largely ignored my frustration, but this year there was new incentive to loot the pet. Harder is one thing, but two years without being able to complete that particular achievement crosses over into ridiculousness I think. And now I've seen two world events that I can not complete because of the exact same problem.
One might rightly point out that no one forces us to complete these achievements and that they really don't mean anything anyway. But one could simply answer that this is a game in the first place and doesn't mean anything also. The fact is however, that people want to complete the achievements and while I accept that one should have to work on them, having a complete world event achievement hinge on a drop and winning a roll is probably too far to go.