I think it would be cool if Achievements counted between all of the characters of the same faction on a realm. Keep the statistics portion for each individual toon, but let Achievements be earned across all toons.
Anyone feel the same? What do you think the downside could be?
Im not saying this would be easy for Blizz to implement, but it would definitely be a cool feature for people who have alot of characters after 5 years of playing. =)