i guess i see multiculturalism in (at least) 2 distinct possible ways:
1. the diversity of a given setting (geographical, functional, social, whatever), in terms of the cultural/ethnic background of the people that live there.
2. an institutional objective, and related policies, that aim to create something like the above.
as #2 is clearly outside my desires for anarchy, i would only speak to #1.
i grew up in one of the most diverse neighborhoods i have ever seen (to this day), and i feel strongly that having grown up in that area (along with some pretty open-minded parents and extended family) gave me a perspective - or at least the foundations for one - that i largely retain, and i value it hugely. skin color, language, sexual preference/orientation, means of survival/sustenance, ... these things were basically a non-issue for me. because diversity was so prevalent, and i almost never left the city, i knew nothing else until i was at least in my late teens. the downside of that is that i was unprepared for the reality of most of the rest of america (and even other parts of the city), and how strongly entrenched group/cultural prejudices were elsewhere (and to some extent, even in my neighborhood, once i could see it).
speaking specifically to "cultures", my neighborhood was predominantly latin american (puerto rican, dominican, cuban), with large black american, anglo and jewish populations as well. chinese and haitians were a smaller percentage, but substantial. and a smattering of eastern europeans, east indians, west indians (jamaicans mostly), other asians, and south americans. there were tons of prostitutes, junkies, trannies and gay folk (often the same person). i can remember a soda fountain/candy store (jewish), a laundry (chinese), a cuban/chinese diner, a cheap clothing store (east indian), several bodegas (latino), an army/navy store (black and anglo), a hot dog stand (eastern european), a pizza shop (italian), a stationary store (anglo), a small supermarket (black and anglo), a small record store (black), a "dirty" movie theater (?), and a pharmacy (anglo) - all within a block or so of each other.
i love the idea of individuals from different cultures living in proximity with each other and interacting in all kinds of ways, so long as that situation is completely voluntary for all involved.
not sure if that is the kind of answer you were looking for...?