{Single fire quests}
Proof is in the poison - Challenge
The pit - Puzzles, Challenge, and Story
Chronoscope - Story, Reward (loot), Fun challenge
{Chain quests}
Waterworks - The first real chain quest you get. Really fun and involving. Can overcome the quests in multiple ways. Decent end rewardsfor non vet status players.
STK - A pretty expansive quest (even for only 3 parts) with a lot to offer. I loved the challenge of the traps and the fights. The shrine placement was heavy in some parts, and thin in others. And that added to the challenge at times.
Catacombs - The first chain or time you run into a wraith (pre necro at least). Very intense and interesting challenge to say the least. Most interesting end battle for that level.