Our friend Lassirra over at Hunter's Mark has a good post up featuring 20 quests you shouldn't miss in the game. If you're looking for something to do in-game between now and next week's expansion, it's probably a great time to go back and check out some of the best quest content in the game.
Unfortunately, her number one quest has been gutted already, but there are a lot of good quests on the list for sure. And quite a few of them have some great rewards as well -- the Barov Peasant Caller is great, I'm still wearing the cloak from Bring me the Egg, and the Divination quests in SMV will let you pick up some nice consumables and gear as well, not to mention a good bit of cash. And some of them are just plain awesome -- Ivus the Forest Lord, I agree, is something people almost never do any more, but once you've done it, the reward of having a big treant kicking ass for you is just too fun.
If you need more quests to do, you can check out our writeups on the top lore-based quests in the game, and don't miss the must-see quests at 70, either. Whether you're looking for a time-filler or want to know which quests to start on when the XP starts flowing again, odds are there are quite a few great quests you missed the first time through.