I've only been to a handful but JLA and the Bell Centre are both great.
Maple Leaf Gardens was such a cool arena too with it's one long-sloped side and generally weird layout.
I wish I could have made it to Boston Gardens as well.
Back in 1990 - a buddy of mine, and I took a road trip to Toronto in late June.
We stayed at the Neill-Wycik dorms which was a short walk from the Maple Leaf Gardens...The front doors were wide open, and the security guys let us walk around for nearly 30 min...Had a good laugh with 1 of the maintenance guys; talking about the Leafs, etc.
Toronto is a fun city to visit.
The Joe hands down. And I have been to Scottrade, TD Garden, United Center (Joe Louis West as I call it.)
Yeah - back in the late 90's I was at the UC for a Hawks/Wings game...Half the crowd - maybe more - were Red Wing fans (keep in mind this was when the Hawks really sucked).
Everyone around me, and my buddies were Wings fans, and when the Hawk fans started their usual 'DETROIT SUCKS' chant - we started our own 'STANLEY CUPS' chant.....Within a few minutes many other Wing fans in surrounding sections joined in, and before you knew it we were drowning out the Hawk fans.