Like @ MissLid I also suggest Tolkiencraft II. I've been playing and streaming it since early beta, and I've enjoyed the heck out of it. The mod author @ GreatOrator is very active and has put a lot of work into fleshing out two styles of quests in the the pack: NPC Quests and HQM Quests. Between the two there are currently 170 quests in the upcoming 2.2.0 version.What makes it unique? The intricate, lovingly crafted city of Draconis where you start. The use of NPC quests from Custom NPCs in conjunction with the HQM Quests. The feel of a living city with NPCs all over, doing their thing. Annoying you by being real and going to sleep when you are trying to turn in a quest. ;P And this doesn't even get to the the part where you head to Middle Earth and embark on the LOTR mod in that land! I haven't even scratched the surface of all that GO has put into the pack, but I keep getting distracted by trying to build my base on flower power (Botania).I enjoy the care that GO has put into choosing mods that suit the feel of a medieval, magical realm, and his care in choosing shows - yet there is still just enough technology for us automation aficionados. A lot of these mods are ones that are entirely new to me, or ones I've only played with briefly and I find the mix he's chosen both challenging to master and fascinating. And don't get me started on all the magic I want to get into, I've been distracted enough with trying to automate things with flowers!