Omg, thank you so much for the wonderful feedback!! ;__; ♥ This part made me particularly happy:

Really love how you manage to combine different colors with stunning results, I try sometimes but more often than not I end up with rather monochromatic icons.

Now that you mention this, I'm gonna be totally honest: the way I do it is to simply force multiple colors into caps where none exist. Idk where others find these colorful caps that have tons of colors waiting to be drawn out, when I can only find caps that have browns and greys. So comments about how superior icons where the maker used colors that already exist in the image are make me despair because wtf, there are no such colors in my caps, like, at all, so it's either added colors or no colors and I prefer the former tbh :D so yeah, that's the way I do it, buuuut it's a style that definitely splits opinions, so not sure I'd recommend it xD besides, your colorings are absolutely amazing, so I'd say you're totally fine even if they have one main color! ♥