I'm dating a theist, and we discuss religion fairly often; in fact, we got to know each other via intense debate in a science/religion seminar. I find it fascinating to hear about his beliefs and he enjoys putting them through the "wringer" of my criticism. By my understanding, it's mostly a matter of different feelings - we don't really differ on scientific principles, he just "feels the presence of god." Also yes, he is cute.
I'm kind of surprised by all the stereotyping of theists in here. Yeah, there are plenty of wackjobs who sleep with a bible under their pillow, but that behavior isn't a requirement for membership in all religious groups. I'd call someone a theist if zie has a religion, or believes there is something called god. Under that definition, it doesn't have to include going to church, praying, evangelizing, or even disagreeing with you on the truth value of any particular statement. "I am religious/spiritual" =/= "I believe in god" =/= "god exists, and you're wrong if you say zie doesn't."
For those who categorically refuse to date a theist, do you define theist differently?