When I was growing up, it was definitely the Flames.
But as I grew older and older, and now live out East (In Montreal), many of my closest friends are from Calgary, and even though I dislike their team, most of their fans i know IRL are decent and knowledgable hockey fans.
Toronto fans on the other hand are obnoxious dickwads who are arrogant, stupid, and firmly believe their team is God's team of destiny, and are shocked when we don't agree the league needs to bend the rules to ensure they win the cup every year.
Here in Montreal, I wear my Oilers jersey with pride at the local games, and act with dignity when we win, and accept a bit of razzing when we lose.
Not Toronto Fans.
Nope, they win here they're acting like Puddy, screaming "LEAFS RULE!! BEST TEAM EVER" getting into fights with people, and just being unbearable douchebags. Even if their team loses, they're starting shit flipping everyone off, and refusing to accept the minor razzings, getting all aggro and in everyone's faces.
Also shocked at how little they know about hockey or even their own team.
If you hear a statement like this:
"The Oilers should do these guys a favour and trade us McDavid and Draisaitl "
...AND sincerely mean it. You can bet 100% certain its a Leaf fan. I'm not even sure the average Leaf fan understands there is a salary cap. And once they DO realise there is one, they think its stupid and unfair for their team.