Can you elaborate? My first thought is tiered by category of the service. No, I don't want my financial institutions to all have the same password, even if it's from the most secure tier.
Sites require you to sign up but it won't matter much if someone gains access to your account on them. Those might as well share a password. Same with sites that share trust buckets like [goodreads, yelp], [facebook, twitter] etc.
In the real world though just memorize separate bank and email passes and use a password manager w/generated passwords for everything else.
Can you elaborate? My first thought is tiered by category of the service. No, I don't want my financial institutions to all have the same password, even if it's from the most secure tier.