Mango pie is one of my favorites! It's similar in flavor to a peach pie, but a bit more tart. I add cardamom to my mango pie because the flavors work beautifully together. I also use fresh mangoes in mine - I've never had a mango pie made with mango puree that I've liked - the flavor is never strong enough!
Mango pie is a great use for mangoes that are slightly underripe, too.