It sounds very Zen, very ancient, almost legendary. You imagine trees in rose blossom, tiny lakes and a gorgeous geisha dressed in kimono arranging flowers in the garden...
It is the old Soviet anthem with new words, but with the same epicness. No matter what you think about Russia, this tune really gives you a sense of something enormous. Maybe the proverbial "broad Slavic soul"?
I like classical music! Opera too! This anthem is in the best traditions of that music.