best RPG supplement
we haven't had a urvey in a while, so let's do a survey:
What's the best RPG supplament you've ever had?
1. What was the best one to read, and why?
2. What was the best one to insert into your gaming sessions and what did it add to the playing experience?
3. What book had the best art?
consider splitting you answer among these categories:
WotC product / D20 supplement / overall best-thing-ever