Ok, let's talk about more pleasant things, then. I ran across a picture I took over four years ago depicting a "setback" heel vs. one that curves to the front somewhat. Shown in the front of this photo is a true setback heel, which comes straight down to the floor from the back of the shoe. At the back of the photo is a curved, traditional shaped heel. I don't know if it has a special name. This is the style that I believe @luvmaryjanez likes the most. In the middle of the photo is something in between, which is what 90% of the stilettos I own are.
Some say that setback heel is simply there to make the heel appear taller than it actually is, and I suppose it's true. Our favorite Christian Louboutin certainly took advantage of this illusion, to his great success. CL makes very few shoes where the heel doesn't come straight down from the back of the shoe, and most makers have followed suit. I prefer a little curvature, but do not necessarily prefer the 1960s style of more extreme curvature. Steve Madden lets you have it either way. My favorite Daisie pumps have a slight curve to the heel, whereas the Vala model has a straight, setback heel. Otherwise, the two models are identical.
There are those who claim that the setback heel is much harder to walk in, and that you should always choose a heel that comes down more toward the center of your heel. I have personally never found this to be a factor at all, but then again, I've never had a lower heeled shoe with a setback heel. Perhaps it really does make a difference in the 2-3" range, but once you get above 4" I cannot tell the difference, other than looks. I will say it is somewhat easier to accidentally catch your heel walking down the stairs in setback heels, particularly if the stairs have those plastic edge protectors on them. Those are the worst!