I've said this before - but this is just a reminder. I'll be breaking BOTL over time in order to get it into a far better place. Just be patient if you can't reach us! We'll be back
Do the aluminum cans you drink impart a metal taste on your mouth? I haven't drunken anything out of a can in a while, so I couldn't say. But, it's highly unlikely.
Beer does pick up metallic tastes. That is why 99% of craft beers are sold in brown glass(the dark color protects from "skunking" which is a result of UV rays - not a temp change like many think).