Well, if you believe Loren Cordain et al, stearic acid is supposed to be the only "good" saturated fat.
It's not my job to defend Cordain, but let's be fair here. Since I'm aware of some of the rest of the story and no one else seems to be, I'll share what I know. I also heard Cordain mention in a radio interview that he had received lots of criticism about saturated fatty acids and acknowledged that there are some "neutral" saturated fats as well as the "good" stearic acid. He also said in The Paleo Diet that the omega 3, monounsaturated and Conjugated Linoleic Acid (CLA) animal fats are healthy. His critics tend to conveniently ignore that.
I know Cordain is not liked here because of his concerns about what he sees as the "bad" saturated fats and about the possible "risks" of raw meats, but it is actually rare for an academic such as himself to admit that some saturated fats and animal fats are "good" and he seems to be inching closer to our thinking on fats.
For example, in a recent newsletter he admitted that pemmican is "nutritious" (though he would only acknowledge marrow fat as healthy and didn't address whether the perinephric fat that was even more commonly used in pemmican is healthy or not). He even acknowledged Stefansson. Here's an excerpt:
Pemmican as Part of the Diet of Native Americans
by Loren Cordain, Ph.D.
From: The Paleo Diet Update v5, #28 - Diet of Native Americans
"Invented by native North American people, pemmican is a concentrated mixture of fat and protein that was used as a nutritious emergency foodstuff, and an extensive review of this subject has been written.1 In his classic book, The Fat of the Land, Vilhjalmur Stefansson devoted five chapters to discussing all aspects of pemmican that were known as of 1960.
He described how the Plains Indians made pemmican.... The preferred fat was marrow or perinephral fat,1 however subcutaneous storage fat was used if marrow was limited.
The powdered muscle and fat were mixed by weight in a ratio of roughly 50:50 that roughly yields a protein/fat ratio of 20:80.1 Although such a mix at first appears to be highly atherogenic because of its high relative fat content, analysis of the fatty acid composition of wild game marrow showed this not to be the case.
...."
So while I'm not convinced by Cordain's concerns about the "bad" types of SFA's and think he overemphasizes them (and I eat pasture-fed and even grain-fed perinephric fat), and I think he talks too much about "healthy lean meats," I acknowledge that he has accepted most animal fats as being healthy or neutral: "good" and "neutral" SFAs, healthy omega 3 FAs, healthy monounsaturated fats and healthy CLA. That is probably more pro-animal fat than over 90% of the academics out there who discuss nutrition.