I used BIP38 when I made paper wallets, but this talk by Alan Reiner has me reconsidering. The argument is that we're pretty good with physical security and don't need to encrypt in most cases. This will also make it easy if anything were to happen to you for your family or friends to be able to access the BTC on the paper wallets, versus it being lost forever to a password in your mind.

https://www.youtube.com/watch?v=qd9C9TQ3pWY

(Full disclosure - I published this video, but it's still a great talk for all users of BTC)