Gmail user...nearly all (definitely over 99%) of my spam gets correctly filtered, but I glance at the subject-lines before trashing the set anyway *just in case* there is a false positive. And in over a year of using Gmail, there has been one, which I could see clear reasons for it marking it as spam.
Anyhow, most of my spam is either the typical viagra/enlargement/similar, or is in various foreign languages full of a number of shady links surrounded in prices and exclamation marks. Links I'd obviously never touch

. They all look the same.
The strangest one I can remember recently is perhaps the one that contained nothing but a single word, "winter", with "work" as the subject. Not going to find out where those links lead, don't particularly care either.