I've only ever dated white men with roots in western Europe, never had any issues with language/cultural clashes as such, but the American was a whiny manchild (always a victim) whilst the Italian was... He was too passionate, he scared me sometimes even though he surely didn't mean to! I don't want shiny things, nor do I want to be a trophy woman.
My sister grew up in a very mixed area and has dated guys from Africa/Middle East. She's had some nightmarish experiences, but the one she's now dating seems to be just as Swedish as her in his ways, just born to parents from Zimbabwe.