RE: FAT Glorious FAT - We sing your praises!
I'm a vegetarian, so I don't use animal fats. But, I use the heck out of coconut oil, hemp oil, olive oil, etc. All the good oils. And avocado....man, do I use a lot of avocado. And, you can buy avocado oil, too, but I usually just use the whole fruit.
I'm mostly vegan, as well, but on the rare occasion I use dairy, it's organic butter. It's WAY healthier for you than margarine.
I even put olive oil in my sugar-free, gluten-free cookie recipes, both to give moisture, and to provide a buttery taste.