Is it the taste? nope
The appearance? nope
What is it then?
Its how true to life their commercials are.
I just saw one done to Fat Boy Slim - Right here Right now
The camera is a first person view through your imaginary eyes (mono eye?) You see all these hot ass chicks talking to you, obvious that they are all going to sleep with you because you are drinking Molson Canadian. They capture the very essence of 'true to life' as this is obviouslly how it always happens with me and my friends.
Rock on Molson