Something I find myself wishing for often, a way to ignore questgivers on the map. I'm revisiting old zones that have had heroic content added, and I'll zone in and get all excited seeing all these quest feathers on the map, only to find they're all heroic, thus not something I'm interested in! It'd be great to be able to ignore quest givers based on type: heroic, tradeskill, repeatable/daily, etc. etc.
I couldn't find a catchall "suggestions/wish list" thread but if I had my way this would be an add on!