WOW Achievements: Ideas you've had

I have played for well, a long time, in that time I have found the joy of pursuing achievements for mounts and toys a lovely way to keep players interacting with old areas. Generally beautiful and interesting it adds player activity to the area and makes it feel more alive.
That said as I sit in SW going through my toys I stumbled upon my Silversage Incense from long ago, setting it at the foot of the dead king I thought you know what this should be an achievement. Going to each of the gravesites of the hero’s of the game a little incense and a lil time spent I dunno “kneeling” in remembrance then eating a meal that would be cool. of course it would need to be a no mount phase but still…Show more people the lore etc etc … So whats an idea you guys have stumbled upon wished for and promptly forgot over the yrs.