As mythic raider I am really looking forward to Legion. My main is Warlock and im going to main it in Legion aswell because I can become Necromancer aka Demonology (Finnaly!!!! woohooo). But still i am worried how are legendaries going to play out in Legion. Really love new artifact system and Skull for warlock. I watch almost every day streams about Legion alpha. My favourite dungeon to watch so far is Vault of Wardens, it brings new stuff (like controling the light, which is cool). I have already pre-ordered Legion and cannot wait to play it.
Edit: I am looking forward to lore aswell, c