Your impressions of Vancouver are dated by about 5 years. A lot has changed over the last few years with the Olympics, Canada Line, BC Place renovation, Convention Centre, Shangri-La being built, etc.
> There is zero night life in Vancouver, and a few very good restaurants (but a lot of great sushi restaurants, much better than SF).
The problem with Vancouverites is that they just like to complain about the bad nightlife even though it is actually fairly vibrant. I have lived in Vancouver for about 15 years now and most of that time I've lived downtown. I can go into almost any bar and hug the bartender. There is a good live music night almost every night of the week. (Guilt & Co, Railway, Commodore, Media Club, Orpheum)
> Downtown is practically dead by 8pm, which is nice. Granville Street which should be like Market Street, is instead almost like a dead street, Robson has a lot of tourists, but no real culture except coffee shops.
Downtown being dead by 8pm is no longer true. At 30,000 people per square mile, it's one of the densest cores in the world.
http://en.wikipedia.org/wiki/Downtown_Vancouver
Granville and Robson are the tourist trap and drunk college kids strip. Gastown is usually packed on Friday and Saturday nights with drunk 19 year olds. Most of the locals hang out in Gastown, Yaletown, or South Main depending on your scene preference.
The sushi in Gastown is garbage, but Yaletown probably has better sushi than the rest of Canada and the US combined (Ki Isu, Honjin, Bistro Sakana, Minami, Blue Water, Hapa Izakaya).
And a list of more restaurants:
http://www.yelp.ca/search?find_desc=Michelin+Star+Restaurant...