Individual Google Accounts - Gmail vs. branded emails/aliases

[Brian - TGL]

I know some people are just managing a handful of GBPs and use one Google Account to manage them all, while others have a self-imposed limit (I have seen from 5 to 20 locations mentioned) of how many GBPs they will add to any Google Account.

My question is can anyone think of any advantages/disadvantages to using branded emails or aliases vs. Gmail addresses?