I haven't been to the AGO since last summer but I am definitely going back very soon.
There are different exhibits showcased at various times of the year and there is a ton to see, good idea may be to check online to see what they currently have going on. MUCH more exciting than the ROM in my opinion.
The prices are fair and they have discounts for students as well.
The architecture is beautiful and the gallery is spacious and well-organized. Whether you are a fan of abstract art, concept art, expressionism, there is basically something for everyone.
In short, if you haven't had a chance to check it out yet for whatever reason, you must must must. and then again.
How I love the state of catharsis.