I loved my visit to Quebec City so much that I have the photos up on my computer Wallpaper, so that I can relive the pleasant memories.
Plus, if you enjoy photography you will be in paradise.
I live in the US, and my parents in the UK, so we met in Canada for a family vacation. They are in their mid-70's, and told me that they would be very sad if they couldn't return to Quebec City - they loved it.
The city has such a Joie de Vive feeling about it. It's totally non-threatening, so that even when you see a crowd of youths gathering, you think, "Let's check it out". This is quite something for me, as I live near Houston TX which has a horrific murder/crime rate, and I have a very high instinct for survival!
Anyway, in QC - the excitement was for some really cool street entertainment acts. I felt safe enough to walk back at night from my parents hotel to mine alone.
We loved the architecture and beauty, and the history and the friendliness of the locals. We went on one of the boat trips to Montmerency Falls, which was well worth it. Unlike many of the other World Hertitage Sites - you weren't nickled and dimed for everything. It's a simply delightful place, and should be on everyone's "bucket list".