My favorite feature of Russian that has no analogue in English is the variety of prefixes that can, for example, add direction to a verb: приехал переехал подехал (prefix before the word "drive" makes it "arrive", "drive over", "just arrived").

The beauty is that these prefixes, being universal, can be added to just about any word adding a flavor you may not have even experienced. Using the same prefixes before a vulgar word makes Russian, perhaps, the most versatile language for cursing.