This run of favorite monsters on the 30 Day Challenge is getting tiresome. I've got three more entries, but then we get into even more esoteric and tiresome questions before finally finishing up with some interesting ones. This is a stretch of the doldrums that indicates to me that this challenge really shouldn't have been thirty days. Twenty-five would have been plenty.
That said, I'm committed to finishing the series, and I'm committed to doing so before the end of September. I'm doing no.s 19 & 20 today (which is the 23rd) so I'm a bit behind. However, if I do two entries every day this week, I'll catch up on Thursday, and Friday I can do entires for Friday and Saturday--Monday, I'll do entries for Sunday and Monday, and barely end on time. Woohoo!
And then, maybe I'll be a little more careful on what I decide to commit to doing--even if that commitment is really only to myself.
That said, tiresome or not, I'm going to go with a humanoid from today's category (I'm not even sure what a "Natural" is, and I'm kind of hit of miss on many of the fey. I love what they've done with the fey category in the Monsternomicon books, but being "unofficial" I'm not going to count them here. But as you probably can tell if you've read any of my other entries in this series, I'm playing kind of fast and loose with my interpretations, and often changed how strict I am (or not) on a whim to give me a reasonable choice to present here.
In any case, I clearly do have a favorite humanoid: the tiefling. I really prefer the 2e incarnation of the tiefling (which carried forward into 3e, 3.5, and Pathfinder) to the 4e version of the tiefling. But I really dig the 4e backstory of the tieflings. My own DARK•HERITAGE setting clearly has nods to both versions of the bad boys.
The best source-material on tieflings that I've ever seen is Paizo's Blood of Fiends title, which I've reviewed here when it was new, too.