I think the community needs to define these terms by consensus by giving specific 2 or 3 oil examples for each. It will be an extremely useful scale for all of us esp for new oud seekers: Here, is how I see these specific terms: Barnyard: Typical organic compost odour coming from fermented Upper Assam Oils. I also use scale of 1 to 10 to gauge its intensity. Not human fecal but more like cattle feces odour used in compost. Animalic: I usually use this one to define Castoreum like dirty butter salty vibe/cheese popcorn/human fecal coming from fermented Laotian/Chinese oils like Hainan Arabi. Basically Musk in its original form. Tan Leather-y/Gentle barn: Almost like the wild agallocha chips on low heat barn. Its there always but it never hampers the experience. I find it in Oud Zacchariya to Manek like oils. Since, animal/barnyard/leather are practically synonymous in daily life these terms could be confusing for someone for those who are not used to such aromas. So if we could have a voting or a separate thread by seniors who can categorise oils accordingly will be of immense help. Esp the old Sultans, royale etc will be of much help. I havent any of those beauties.