Two important ones; both of them are integral to the "who" of who I am.

"Complementarian or Egalitarian?"

Search this blog for "gender" issues, I am a firm Complementarian - this is a deal breaker.  I am convinced from Scripture that the husband is the head of the wife, as Christ is the head of the church.  That Christ is the role model for a husband's love, and the church is the role model for a wife's submission.

"Reformed?  Or what?"

Not a deal breaker, but darn close.  I want a home of peace, and I cannot be at peace with somebody who is constantly at war with my beliefs.