To stylize WP_Error messages or not?

Personally I prefer to put all errors in a debug.log file using error_log and it would be readable enough as it includes break lines automatically.

I think not all the errors should be visible for clients.
In case that I need to show an error to the user, I check the error type and I show a short message with a custom code like Sorry, Post ID is missing [error 12] and the I know Error 12 could happen in certain cases.