I was just wondering if there is an achievement for completing all quests? I have the 250 quest achievement but I was wondering if people just do a lot of them to gain reputation or if they do it because there really is an achievement.
There is an achievement for 3000 quests I believe, but none higher (I forget which I have). There is no way to get all the quests because there are quests you will never be able to complete because of race/class/etc., but also there are lead-in quests that are not compatible with each other so you may only get one of a group. If you are a completist, you might want to download the addons Wholly and Grail which will be able to help you immensely with your quest needs.