I feel attacked
I love my Birkenstocks and wear them all through the summer day and night. All year round they are my slippers. My feet are very difficult to please, and blister at the slightest provocation...and in most shoes I feel pain...in the ball of my big toe, underfoot, on my bunion of course. I don't think there is a bone in my foot, on top or below, that hasn't given me at least a dull ache. Heels give me a burning sensation without exception.
I do have some sandals with block heels that I can occasionally get away with, and some wedges...but mostly my feet are only really happy in Birkenstocks.