Loving your own ethnicity an all things attatched to it is fine, if a little pretentious and arrogant, but you specifically mentioned dating within an ethnicity (and I quote) "to maintain those customs, to uphold the same values etc" Ie: the purpose of the relationship is to perpetuate an ideology. It certainly doesn't sound like it's just a preference, or something that you would put love ahead of if you fell in love. Just an observation. If you really would, then I see no problem with thinking that way, I personally am not particularly fond of guys from most african cultures, and would probably not date one, unless they really were special, I guess that does not have much less of a 'superiority complex' type undertone to it that your thing.