I'm clumsy, and like my things to be durable and not interact with my rather corrosive skin, so Aluminum, Brass, and Copper are off the table for me. Al-Bronze and Titanium work very well, with Titanium taking the cake for light weight, hardness, and durability.
While Titanium sucks thermally, I rarely need more than 60 lumens of light, and very rarely more than 250 lumens, so most of my use produces low enough levels of heat to work just fine in a Titanium host.
Aluminum is nice for a beater that you don't care if it gets dented, scratched, covered in grease, etc. However for EDC titanium wins for me between the durability and of course the aesthetics
Seriously though, aluminum turns my hands grey...