[X] Crake
And while the population of Sorcerer's Deep is currently smaller than that of most of the older big name cities, I would wager that a much smaller proportion of our populace are space fillers, for lack of a better term. Per capita, SD likely has far more scholars, mages, artisans, craftsmen and women, traders, etc. than any other city can hope to claim. Oldtown might have more scholars, Myr might have more craftpeople, Asshai might have more mages, and Braavos might have more traders, but we have it all. And we're growing!