We are talking only about Canadian Beers, right?
In that case I have to say that St. Ambroise Oatmeal Stout probably tops my list.
http://www.mcauslan.com/en/index.html
Other than that I like many beers but there is one that I just don't like that seem to be so many people's favorite: Kieth's
I just don't like Kieth's
(not a Canadian Beer but, I really don't like Heineken either)
The original post mentioned the first beer ordered in a bar when under age. For me that was Brador. I remember thinking how anyone could have sold any alcohol to me at 15. It was obvious that I was not of age. The only thing that I can think of was that they were possibly a bar that was really not likely to get raided.