What grind are you talking about? There's no grind at all in the early levels of this game, at least not on your first class. Quests give you more XP than you need so you'll generally end up outleveling a lot of them. Now if you add multiple classes, then you may get into some grinding, as you'll already have used a lot of the quests on your first class, but as others have mentioned, even then there are lots of different sorts of content, so you can vary how you level enough to avoid grind even then if you want to. The only time you'll really get into a grind is at endgame. Endgame is all about grind, but that's true of any MMO, as the whole point of having endgame content is to keep people busy until the next expansion can be developed.

As for when the fun starts, that's level 1.