There are several books I would very much like to read in German--favorites of mine, read in English years ago. And German is so useful for scholarship of Classical Greek and Latin. Maybe I'm not too old to learn it, one of these days. That would be great.
There's no reason you can't learn to read Russian, of course; it just takes application. From your profile you seem much more accomplished than I am as a language learner. So far I don't read (much) first class literature in Russian. For two reasons: genre / popular fiction is so fun, and I'd like to be a very accomplished reader when I tackle the classics. Actually, Tolstoy's prose is not difficult--it seems easier than, say, Dostoyevsky--and you'd have a leg up, knowing French. :)