In my five years (really, I can't believe it's been that long!) of living in Quebec I have to say I have come to enjoy each very distinct and sometimes extreme season. Apart from Spring that is, which i find is a bit of a muddy anti-climatic meh! Autumn is by far the most spectacular from a breathtaking visual perspective...it's my favourite time of year to take photographs too. (Some of last year's best pictures are here ).
We're about to hit prime leaf peeping season over the next few weeks and we're hoping, weather permitting, to take a family hike every weekend until the end of October to soak up la flambée des couleurs. Week one was in Mont St Hilaire, an hour's drive for us south of Montreal. The children quite happily managed a two and a half hour steep hike in perfect 21C weather - you can just see the foilage starting to change here.