I was here last night at the Leafs game, they've really improved the game day experience overall in the last couple of years. Though the fans weren't super loud - it is a regular season game after all, I had a good time. Unfortunately the Leafs lost in a shootout. I got tickets in the Ford fan deck in the 600 level, just tweet to @TheFordFANatic and you'll get a chance to win! It's far up on the end zone, but you get a pretty decent view.
Food and drinks are expensive, but that's how it is at most arenas/stadiums...
Tip - get the Leafs app, and you can get a lot of free Rogers experiences such as toques, alumni meet, skating on ACC rink, etc!