The weirdest thing just happened...
I have been using the Penumbra SA set on my 60% for a little while now and it looked and felt a bit odd at first, like the keycaps were all angled slightly down. Got used to it pretty quickly, though and fell in love with thick SA caps (they feel sooo good on 62g ErgoClears!).
Now I just received my GMK Dolch, thick Cherry profile doubleshots. I pulled off Penumbra, popped on Dolch and... it looks and feels wrong to me.
I have to say, I think I prefer all Row 3 SA even to GMK Cherry now. Seriously, I prefer caps made by SP to GMK... Just seems wrong somehow.
The truth is that Cherry and DCS profile, while being contoured are also "stepped", by tilting all the tops "backwards". After using a "flat" profile for a little, the stepping just feels odd. It seems to actually increase the distance between the keytops, like you have to lift your fingers over the edges instead of just sliding them across.
In the end I guess it's more about what you're used to and then comes down to personal preference, but I love SA profile now.
This has got me even more excited to receive my Jolly Green Goodness from this GB!