Do cans change the taste of beer? My favorite beers come in bottles and in cans. I always buy it in bottles because I've heard that cans negatively impact the flavor of the beer.

Is this true?

If so, how does it work?
First, I love this question because it is actually interesting.

I researched this when I noticed that bottled coke tasted so much better than canned coke. Cans keep out all light so the contents actually never become tainted. The reason that most like bottled over canned is because they like the taste with those impurities. 
Some complain that they can taste aluminum with cans, but this is more than likely in their head since cans are lined with a thin layer of plastic. 

I like certain beers better in cans and certain ones better in bottles. I would try both :)