In the meta question Should we set some preferred standards for usage of romanization?, we expressed a strong preference for avoiding the use of any Romanisation in answers where possible.
However, in some cases, it will seem sensible to use Romanisation - e.g. if we're answering a question asked by a beginner on non-Korean speaker who doesn't seem comfortable with Hangul, or perhaps in some cases when discussing pronunciation.
In these cases, should we prefer a particular type of Romanisation?