Take the online version of the June-Myers-Briggs personality test at Humanmetrics. The MBTI (Myers Briggs Type Indicator) as it is called in academic circles can be used to identify some basic personality preferences. The MBTI can be a useful way to understand the degree to which you and your partner share the same preferences. Ideally, by taking the "test" you learn to appreciate one another's differences and learn how to better handle areas of dissimilarity.

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Queendom.com provides several personality and relationship related tests as well as an advice center, etc. A fun but not necessarily "scholarly" site.

Queendom.com: Tests, Tests, Tests and more Tests, The biggest testing center in the world with personality, intelligence, relationship, career and mental health related tests.

What is your attachment style? The following link is an interactive test that will provide you with your "attachment style" based on your answers to the questions. http://www.web-research-design.net/cgi-bin/crq/crq.pl