I'm not Canadian, but I drive through Canada on my way from Detroit to upstate New York and I'll point out some good and bad things.
GOOD:
1. Windsor, Ontario is a nice destination if you're underage in the U.S. For one, you can drink at the bars there and also hit on the young U.S girls that fill them up on weekends. To make things even better, you can gamble at Casino Windsor. I've been to Vegas, and the Casino Windsor is actually on par with some of the casinos on the strip.
2. In the middle of nowhere, there will be random gas station/megastores. They may not be fancy, but they serve as the gas station, video rental place, party store, and fine gift outlet for whole towns. Those towns may have a population of 15, so I can see why these places exist.
3. You can laugh at weird French-speaking people at rest stops.
BAD:
1. The bars have lots of weird Asian dudes staring you down, especially if you try and hit on their girlfriends. Fighting in a parking lot may ensue. Also, don't go to the Casino Windsor with more than 10 dollars. You will lose and then have no money to buy gas for the way home. If you already have gas for the way home, you might be on your merry way only to get stopped at customs for a "random" search. Oh Canada indeed.
2. Random gas stations will have a wide variety of bad movie sequels to choose from. Do people in Canada really enjoy watching Caddyshack 2, any Police Academy movies, and/or Robocop 17? Also, the attendants at these places may be men or may be women. The point is, it's usually very hard to tell. I just call them all "Pat." That takes away from any possible confusion...
3. You have to listen to weird French-speaking people at rest stops.