Quote Originally Posted by ScottDoom View Post
Hey xdandeman. Sorry you had to experience that!

I also missed/forgot the memo about unlocking additional game content via the "blue/+ sign" quests, and had to go back through areas I already explored to pick a bunch up. Those quests unlock additional game content that ranges from treasure hunting (I think) to new optional dungeons. Always be sure to pick them up alongside the MSQ so you don't miss out on anything.
I learned this after I hit 50. Now I make sure to clear any blue quest givers before I leave a zone. Unlocks classes, dungeons, raids and flying.