It is. I prefer PvE and I love this game. I actually surprised myself by enjoying PvP as well though. Most games I hate it, but in this game, it really is more about teamwork than "I is #1 cuz I kill moar than u". Once you reach level 25, there are daily quests that are in a PvP area (Caergate). Those you can do or not as you choose, but they are worth a good chunk of experience. The way they are set up though, you don't tend to do them alone. They are escort quests that leave at a certain time (:40 past every hour), so there's usually at least a few of your allies there waiting to go too.
I played alpha and the only reason I even tried the PvP was because I figured, hey I'm testing, better test it all. I'm glad I did, because it was really fun!