It’s a good MMO, but it’s still an MMO.
If you find single-character combat dull, I don’t thing GW2 will improve on that. It’s more dynamic than other MMOs in that you have to move around, dodge a lot, and switch weapons a lot. But it’s still single-player combat, you don’t get to pause and tell your healer to heal the tank, choose which spell your wizard will cast, etc. etc.
There is a single-player personal story, and it’s WAY better than the SWTOR one (which I found dull as well. I found all of SWTOR dull, actually), but it’s not the same as a single-player game that’s built around the story.
Grinding and waiting for spawns is way better than any other MMO I’ve played. In fact, I wouldn’t really call anything I’ve seen in GW2 a “grind”. Sure, you can do the same quest over and over if you want, but there’s so much to do in the world that there’s no need to if you don’t want to. And even when redoing it, it doesn’t seem like a grind. GW2 quests are much more dynamic - if you’re in an area where a quest occurs, you just do it, there’s no Quest Log, there’s no running to an NPC to “get” the quest.
An example: a given town is having trouble with bandits. Periodically, it’s raided by bandits. If you happen to be in the area when the bandits attack, you can help drive them off, and you get gold/xp/etc for helping with it. If you don’t want to do it, no big deal - just head on out and do whatever you want.
Same thing with boss fights. Crazy Scary Troll marauding the forest? Join in the hunt to kill him.
The only quest turn-ins make pretty good sense. For example, if you’re raiding a bandit camp, you might come across bandit attack plans that you can turn in to an officer standing outside the camp. But if you don’t want to do that, you don’t - most quests have multiple things you do, like “Raid the bandit camp, killing as many bandits as you can. If you come across bandit attack plans, Sergeant Joe would very much like it if you bring them back to him. Also, here’s a bottle of poison, see if you can manage to poison any water supplies you find.”
You do any or all of the quest things. As you do them, a quest bar fills up, once you’re done with it, you’re done, and you get a letter in the mail thanking you and giving you a bit of money.
Make sense?