So far I haven't found this game very grindy at all. Of course, I'm coming from LotRO, which has always been somewhat grindy, and has become more and more so over the last couple years. I appreciate the bonus quests: they're optional, give good xp, and have you killing things you normally have to kill in the normal course of your questing or making through a mob area to get to a quest location. Often you have to do a little extra work to finish tier II or tier III of the bonus quest, but honestly it's really not that much. On the classes I've played so far (Sage, Gunslinger, Vanguard, Sorcerer), I've had no problem dps'ing mobs down quickly, so it's not much extra time finishing out bonus quests. I've really been enjoying the non-class quests on each planet so far; they really get you involved in the history and flavor of each. The voice acting is just icing on the cake. Maybe I'll eventually hit a grindy planet, or perhaps end-game will be, but so far it hasn't seemed that way to me at all.