I like airports, it's always a great feeling leaving to go off somewhere and arriving home. YYC is the plain jane of all airports, theres not much to complain about nor is there a lot to be exited about.
The security and border clearances are efficient and thorough, unless your planning on going to the US which if there are several flights going out at a certain time of the day, the lines can get REALLY long.
There are some shops worth checking out just to blow some time: the Virgin store, Coles Books, the sticky button Arcade, and Who's Who in the Zoo. You can even visit those Dead Sea Salt spa folks and have them wash your hands and talk you into blowing $100, they'll really take up your time.