Fair enough :) My reasoning for a Dundas-Gerrard subway was twofold: first, it would act as a second DRL (perhaps you'd be right if you were to tell me "that's overkill"), and second, it would provide another higher order east-west option south of Bloor, taking pressure off of the 501, 505...

Here's a fantasy map I cooked up recently. It's somewhat of a synthesis of a lot of the ideas kicking around here on the forum, along with a few ideas of my own. It includes subway, light rail, regional express, and BRT lines. click here