I find heels more comfortable...well I say "heels" but my old pair of shoes (inherited from my sister actually) which died a horrible death due to overuse (the backs of the heels were ridiculously sloped and the insoles came out, well got 12 years out of them)
They're very round toed, great support, they were boots up to the ankle, no lacing, elastic sides (sort of like in jodphur boots). I could walk around in them for hours and feel no pain at all, they were the best.
Then the trend of super pointy shoes came along, I have wide feet so I cannot wear them. I mean physically cannot cram my toes into those things, so I don't even try.
Now round toes are creeping back in but still very very slowly, and thick heels are still a time away from making an entrance back into mainstream fashion.
And that, is why I want those Stella McCartney platforms. *sigh*