LPChip's right about the gradients. I was being lazy. I've now added 2 new gradients to the tile pack. You can see how they look in the top post, pictures 2b and 4b. The light backgrounds now sport the same polished look as the dark backgrounds. More importantly, for me anyway, they aren't blindingly bright.
I suppose I can take these sun glasses off.
Oh yes. Not painful to look at at all.
I also adjusted the colored tiles in the dark set to show better on the light backgrounds. I added a drop shadow to the post-it note in both sets. I'm much happier with it now. I probably would have left it as it was without LPChip's criticism. So, thank you LPChip.
By the way it is egomass-ive as well as ego-massive, a double meaning. So, if you're going to capitalize it: Egomassive. I don't capitalize it to intentionally belittle my arrogant sounding name.