I think there are too many things that can already cause difficulty and stress in a marriage w/o adding religion differences into it.
No one can make a "perfect mate sheet" and then go shopping. <Sometimes it'd be nice though... well, my husband is a keeper anyways!> But you *can* make sure you sit down, think about what values are essential to you in a marriage partner, and settle for nothing less.
As an example, mine might have been Christian (preferably charismatic/pentacostal) <similarity in worship styles is a plus>, good with children, wants less than two kids, doesn't expect me to be a stay at home mom, good with money cause I'm terrible at it, respects his mom <I think that says a lot about how a guy will treat you throughout life>, etc.
Your list will probably be different. Those would have been things I would NOT have strayed off of. <Well, had I been Christian at the time I got married...> Then I have all my fun stuff like "and I prefer blue or green eyes, thin not muscular, and no back hair." Those are compromisable issues, although technically on my "perfect mate list".
Seriously, though. Sit down, think about what is vital to you in a marriage. What do you absolutely insist on from anyone you would consister marrying? Make sure your list isn't totally unrealistic, and make sure you have nothing unbiblical in your list. Then start dating from there.
Shalia - who hopes some of this makes sense.