A range/target gun? Stainless, with good 20 lpi checkering.
A lightweight, rust-resistant carry gun? Alloy or polymer.
Boy, all these shooters with their teeny, itty-bitty narrow sections of likes and dislikes. Not happy unless they're gathered with their fellow tribesfolks...
I only like the ones that have triggers and go *bang!*...
Polymer seems to be lighter and holds less heat. There are times when I carry a full sized steel pistol, but in general, polymer is a great advantage for regular carry.