Did Town-class cruisers receive the best captains?

Was it Royal Navy policy to place its best captains in Town-class cruisers, as with Tribal-class destroyers?

Partly. Town-class cruisers were prestigious modern commands, and the navy sought officers with the experience and temperament expected for those postings.

The Town class comprised some of the Royal Navy's newest and strongest large light cruisers. Officers joining such ships faced high expectations and tended to hold themselves to those standards. Selection for commands such as Town-class cruisers and Tribal-class destroyers favoured relevant experience and personality. The Royal Navy's size gave it a substantial pool of officers, with reciprocal access to senior officers from Dominion and Commonwealth navies. Those combined resources helped it fill important commands with capable people.