A must, enough said!
It has Structured PvP for those that like fast warzone type PvP action. World vs World for open World PvP. And the PvE action is extremely enjoyable, that has a casual atmosphere. The game encourages exploring and never makes you feel that you're missing out on anything.
Another thing is the crafting that most people fail to mention. I am a big time crafter, I have all but 1 profession. The game is simply a joy to craft, crafting is extremely well thought out and never penalized you like so many MMOs. Everything is available in one interface or is available nearby. Crafting in some MMos feels like a job, not this game, its actually a LOT of fun. This is a game with a lot of options, I highly recommend this game to anyone.