@Nishy: you seem to be having these thoughts of late. I could have sworn I saw a post of yours much like the OP recently. Nothing wrong with that, just q curious observation.
For myself, I require a razor that clamps the blade really tight, minimising the flex. Only took about 50 of them and a bunch of posts by folk raving about blade rigidity to find out.
My recent purchases were pure curiosity, really.
It doesn't matter what material is used, but the shave geometry does. Otherwise, I can't go comfortably ATG, or I have to mod the head to alter the geometry.
Soaps I only have a few, as I knew reasonably well what I had been after and don't care much about getting more or changing brands until I'll have to.
Brushes I have a few due to their sizes and properties - I tend to use one depending on what I need.