I regularly wear 2 pairs of shoes without any heels: Mocs and boat shoes.
Then I have 2 pairs with some sort of heel: Chelsea boots and Dr Martens 1460.
I do notice a difference in the feel, but I'm undecided on which is more comfortable. I can only say that the sharper the angle of the heel, the harder/faster I tend to slap my foot down — I'm gentlest on my mocs.
Any thoughts on comfort and (potential) long-term effects of heel-less vs heels? Do you choose shoes for the occasion with heel/no-heel in mind? Does anyone care?