Porter Airlines makes flying pleasant. They have small planes which fly from Billy Bishop Airport on Toronto Island. This is the view from the window as I was approaching the check-in area. I've written about Porter before.
A free shuttle takes you from downtown to a ferry on which a three minute ride takes you to Toronto Island. No long lines as the planes are small and security, while thorough is not unpleasant. The lounge is comfortable, with free wi-fi, a "business centre" with computers for use by anyone and a cafe area provides free drinks, coffee, teas, cookies and other snacks. You feel like a person, not like cattle, which is more the case in larger airports.