Beautiful graphics, amazing combat, lively world, and plenty of skills to level.
I had a blast leveling to 50 back when it released. What killed me on it was that once I reached 50, I still felt like I'd have to sink hundreds of hours into it just to catch up/keep up with all of the other players to even be viable in PVP. I personally love PVP whether it's open world, arenas, BGs, etc. and you definitely have to grind a lotttt to be viable in PVP. That is what made me stop playing. Although I've considered giving it another try. I may give ESO a try though as I should be able to jump into PVP much easier.