Keltin, I gotta agree with you on principle. I prefer butter to margerine, for health and flavor reasons. But I have no right to force my opinions on you. If you like spreads, then by all means, use spreads. The lighter spreads that are available nowadays are made up of a combination of oils, milk solids, salt, water, and flavorings. It is the addition of water that reduces the amount of fat in the product, although whipping also adds considerable air, which again replaces some of the fat. But if you are eating spreads such as those that have been around since the 60's and 70's, you are eating just as much fat as if you were eating real butter, just different fats. And in fact, those hydrogenated fats turn out to be less healthy than are the real fats.
There are better spreads currently available that are made from healthier fats, and that are made with no trans-fats (hydrogenated fats), that are healthier. But you have to read lables. Also, there are two camps concerning products made with canola oil. One camp swears its the healthiest oil on the planet, while the other camp swears that it is evil, destroy your brain and body stuff. So again, the choice is left up to you.
Let's call a spade a spade, shall we? Fats, any and all fats, even EVOO is a callorie rich food with little redeeming values. The better fats play important roles in the body, such as transporting fat-soluble nutrients, and acting as catalysts for bodily functions. These fats are essential for health, but must be used in moderation. Then there are fats that just taste good. Omega-3 and Omega-6 fatty acids are necessary for brain and nervous development and are found in flax, and fish oils. Vitamin E is a fat, and is an important anti-oxident. There is much information available on fats. I have seen some truly great explanations on this site, defining various fats and how they affect the body.
Basically, oils (fats) derived from seeds, fruits, and nuts are better to use, than are vegetable oils and animal fats. These include grape-seed oil, olive oil, avacado oil, saflower oil, sunflower oil, etc. The vegetable oils include corn oil, coton-seed oil, coconut oil, etc. And animal fats aren't even all to be painted bad. Fish oil from tuna other than albicore, and from members of the salmon/trout species are very high in omega-3 fatty acids. The downside being that some fish have significant amounts of methyl-mercury stored in their fats. Again, you have to do a bit of research.
Ok. I'm done now.
Seeeeeeya; Goodweed of the North