I find the Love Languages test, http://www.5lovelanguages.com/ , despite sounding a bit odd, to be useful. It rates whether you express and feel affection more strongly from Physical Touch, Words of Affirmation, Quality Time, Acts of Service or Gifts.

Mainly useful because while the results made sense, they were not the ones I tend to think of and present as most important (or that I would like to be most important to me) - so they gave me a bit of insight into what emotionally felt best, rather than what I would like to appreciate most. Similarly it's useful to have partners try it, as it may be different from what they ask for or think is important.