Well worth doing. Takes 5 minutes. You will know yourself better. You will understand why some things matter and somethings leave you cold. And if your partner can implement your love language you will feel sustained and impowered.
On the assessment page there are links for a single, husband, wife, and children love language test and there is also a test to learn what type of apology you value most. http://www.5lovelanguages.com/assessments/love/