hmmm I dated a non christian for a year and a half and it was one of the most emotionally and spiritually forfilling experiences of my life but then she did have quite christian moral values (no sex before marrage etc.) which made things easyer.
I think christian /christian relationships are very healthy (probably the way to go) but don't let religion be a barrier. Its not always a bed of roses but then few relationships are. Just because you hold different beliefs dosent mean that you can't have a mutualy benificial relationship in which love is given and recieved. It is however harder.
By love I mean the corinthian definition:
1Corinthians 13:4-7
Love is patient, love is kind. It does not envy, it does not boast, it is not proud. It is not rude, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoices with the truth. It always protects, always trusts, always hopes, always perseveres.
I don't think interracial couples have ever been a massive issue where I live in england but then weve been invaded so many times our gene pool looks like a Jackson Pollock painting