Platform, yay or nay?

I would say it depends on height. The 100 and below are better without the platform, 120 and above would be better with the platform. I say this in terms of what's comfortable with how steep the arch /incline is. For example a 120 with a platform essentially feels like a 100 without a platform. Ofcourse, like everyone said, it's also based on personal preference on what's comfortable to you.
 
While non-platforms do look nicer, it's so much easier to walk with platforms (at least for me). Unfortunately, due to a running injury on the ball of my foot, I can only wear platforms if I want any kind of height in the heels AND walk pain free.