If you're still young and adventurous, you'll hear VanCity & Toronto being the two hotspots for sure.
I've also lived in Toronto for most of my life and I LOL when people picture igloos and eskimos or 9months of winter.
Over the last 30 years I've lived in various spots here from the downtown core up to Markham over to Wasaga Beach and you get different flavors everywhere you go but it's beautiful everywhere and frankly the winters here are rather disappearing (this year has been retarded with about 5 light snowfalls? + temperatures throughout? Today it's hailing/raining but warm).
Downtown is just FULL of life 247, 10 minutes in any direction and it's your typical suburb (NOTE: We are the most multicultural city in the world, so there's tons of 'china towns' and 'polak buildings/hoods' literally all across the board of cultures = translates to amazing food and great diversity among hot women). Never a shortage of social life and shit to do, and I believe Toronto still holds the most dancefloor space per square foot as a city than any other city (our clubbing & concert district has been a hotspot for years).
Forgot where I saw the report but it had 4 of Canada's cities among the top 10 cities in the world to live right now - I'll try to find it.
I've played with the idea of leaving, remaining a citizen but being a resident elsewhere and all that however I'm not ready, and in the meantime I don't think there is another place I'd rather be (sans some of the winter I suppose), especially with the world going apeshit right now.
Property = all depends on what you want in life. I'm doing the whole waterfront property thing shortly to take a break from life (I'm in my early 30's, done well, want to fish now

) and looking at stuff between 300-500K gets you a lot here - however that's not downtown that's an hour or so north. Downtown you're looking at 1M for the same property, in fact I don't know of anything waterfront (true waterfront) downtown that's not in the milly's.
French: I've been learning it since grade 1, stopped in highschool, never really retained it well (already speak 2 languages) and don't find I need it other than when the food aisles have canned goods backwards and french labels show

. You won't need to learn French I don't think I've met anyone that speaks French only (even in Quebec/Montreal - they HATE ON YOU if you can't at least say Bonjour etc but I wouldn't want to live there for more than just language barriers).
People: While in the downtown core it's simply BUSY, nobody stops and talks but at the same time you'll see that common daily interaction between people everywhere is happy go lucky and overly polite.
Crime: Meh, I lived in what toronto would call a ghetto area most of my childhood (Scarbronx) and got to see/do a lot first hand but it's NOTHING compared to the states/other parts of the world. Our ghetto's aren't typically ghetto's and we don't have race wars or class wars (perhaps in subtle ways but that's it).
Terrorism/Sheeple in fear: We don't condone or fall prey to this shit. Almost every single person I talk to in person about world issues and the like, is pretty educated and lives fear free, fully aware of agendas and propaganda. Though I'm sure I don't surround myself with idiots either so that's bias - still you'll notice that we're way too multicultural to try to play this card here, it just doesn't fly.
Advice: March/April shit starts really picking up re weather and night/city life - take a few weeks and visit Toronto and Vancouver and experience it during this transition so you see a good average (if you visit during a harsh winter week you might hate it - if you visit during a hot week in August you won't leave).
Oh Canada!