Passwords vs. Passphrases
In general, a password is a continuous string of characters that could include letters, numbers and symbols. Passphrases, on the other hand, tend to be a sequence of individual words.
A common recommendation is to use passphrases rather than passwords, because they are harder to crack, but that statement is misleading. Passphrases tend to be lengthier, which affords them greater security, but a randomly generated password of the same length would be significantly stronger.
As a comparison, a completely random 12-character password would take 251 centuries to crack using cracking speeds achieved by Distributed.net’s RC5-72 network-based project, but a 12-character, three-lowercase-word passphrase would take less than a second using a dictionary attack.
The main advantage of using a passphrase is the ease of remembering it, so if you dislike password managers and don’t like copying/pasting from your own [secure] collection of passwords, then passphrases are definitely the way to go; just make them at least six words long and consider throwing in some capitalization and punctuation.