Since I've made a new wizard, I've been getting all the side quests I can. They've been accumulating in my quest book and it's really hard to find what I want. I think it would be a good idea to have an option to sort quests by world or the amount of experience gained.
Yes. Storyline quests should be a different color; maybe a darker/lighter brown.
Also, I would love to create filters like you can in Gmail. Filter could include certain types of quests (example: side quests), people who give you the quests (example: Merle Ambrose), and where the quests are from. Depending on the filters, quests could go into different folders. I doubt this will happen, but I'd like this feature very much.