I've lived in YVR and currently live next door in YYC.
Vancouver is not a mystery. It is not a world class city, especially in the sense that the cities marketers want you to perceive it as, with amazing destinations, or things to do. The guide books will steer you straight.
If I were you I'd spend 3 days there at a maximum, and then 3 days on Vancouver Island. That's where the value is.