I can see I'll spend quite a lot of time browsing, great job! There is just one thing I would suggest:
On the Quest entries, there's a "Prerequisite Quest" entry, and a "Rewards" entry - but no entry for a "Follow-Up Quest". That would be very useful, especially if you don't know where the quest string ends. Then if I found a quest that looked like it might be interesting, I could follow the chain of quests forward and see what is to come.
Other than that, it's very cool!