Toronto FC games are amazing. I was at the 1st ever one and it was incredible. We lost but I'm pretty sure we have the rowdiest fans in North America hahaha... I grew up in the UK so I'm really happy to have an MLS team.
The only thing that sucks is that it's hard to get tickets. And I live right by BMO Field so it sucks when I can't go to the game but I can hear it from my back yard!