I'm in favour of the homogenization of culture. I'm in favour of a relatively homogenous world culture. Cultures with strongly divergent views and practices, that are also firmly tied to specific geographical zones (be it nations, cities, or just pockets of cities) provide a recipe for conflict and war.
Of course, such diverse cultures arose not out of some intrinsic value in having diverse cultures, but more out of circumstances beyond the control of humanity : disparities in environmental conditions across geographical zones, as well as insurmountable obstacles to travel and communication between different zones. The latter is probably the main reason that cultures diverged. Cultures evolved in isolation, without exchanging with other cultures and developing together. Different cultures, left to their own devices, came up with different answers to the same problems. A lack of frequent communication and connection. Of course, this is no longer the case. Communication across the globe is as easy as blowing your nose (In fact, sometimes it's easier).
I think it's inevitable that traditionally strong cultures will be diluted through interaction. This is not a bad thing. The boundaries between one culture and another will become more blurred as time passes, leading to the birth of a world culture or human culture.
I don't judge or evaluate people by their race. But there are some cultures (not races) that appeal to me less than others. It is no longer the case that someone of a particular skin color has to belong to the particular culture which that race has traditionally belonged to. More and more, race and culture are becoming two very different things.
This said, I have several friends who belong to different racial groups. We are all human. We all have the right to adopt and feel privileged to the advances made by cultures other than that culture from which we most directly descended. Any advance made by one culture is an investment into humanity as a whole. Each new human being born onto this planet should not have to suffer and be constrained by the legacies and failures of the culture which they are born into. Culture should not be imbued in the individual but rather should be adopted by the individual. It is a choice which the individual should make.
Stronger emphasis on individual freedom as opposed to group structures allows individuals access to many more alternatives than ever before. To some degree, what we're seeing is the slow erosion of group structures. Group structures that still exist are becoming decentralized and their boundaries less restrictive and less exclusive.