Been a Warrior since 2.0.Always loved the class.Especially has a huge roegdyn being the kind of axe wielding tank over a guy hiding behind a shield made sense.Been through the good and bad with my Warrior.Was treated like i had lepracy in 2.0 when i tried to do coil or Titan HM.It's funny how things change and now Warrior is in the driving seat and Paladins getting snubbed.I love and hate the way Warrior is right now.I love how my dps is so awesome i can carry bad dps.I hate how bad dps expect us in raids to carry them instead of getting better.I hate how so many Paladins are jumping ship to play us as it's the better class or it's considered the tank for noobs.
I've leveled Dark to 60 too.It's fun class.Relying on mp and getting to use half your dark arts versions of skils very rarely can make it dull though.Both tanks are in a good place.My suggestion though just go whatever you feel is most fun.