I had played Wildstar an Esper, and leveled to 50, on the Dominion side.
I had also played a Medic, leveled to 20, on the Exile side.
Visually, the game was rather stunning and the hybrid of elements were very interesting.
The leveling process was challenging, exciting and interesting. Unfortunately some quests were a little grind-i-er than I would of liked. The leveling process starts with a faction-only environment, and then splits off into a lot of shared zones for opportunity for World PvP. I found the Dominion leveling process to be important, like I was making a different, saving thousands from exile terror. I found the amount of leveling I did with the Exiles to be very morbid, and disheartening. It was actually kind of sad to play Exile. The art was not as stunning on the Exile side either, however, Exile has some interesting themes and the constant pursuit to persevere through their agony.
PvE, Dungeoning, Adventuring- I found this to be the most enjoyable part of game, as it was always fun and interesting even to repeat, having done these a ridiculous amount of times at max level, I still get excited and deeply into them over and over making the process quite literally thrilling. A lot of things are very challenging however, and may deter those who want a less hardcore experience.
PvP, BGs, World, Arenas- I found this to be an enjoyable aspect of the game and the combat system makes PvP much more interesting and fun. However I found PvP to have some flaws, in group fights, things got too chaotic and created some confusion. Bots are also a problem in leveling PvP, as they throw you game and destroy the sense of competition.
Lore wise, the game is extremely interesting and competes with other MMOs that are heavily lore based such as LOTRO, or WoW.
Customization, Housing, Mounts, Dyes, Costumes- The game revolutionizes the way you have mounts, explores hybrids of systems in housing, and makes costumes very interesting and unique. This is an extremely fun aspect of the game because the possibilities are endless.
Overall the game has been a lot of fun so far and I plan on playing for a lot of time to come.