Mick Jagger is the headline grabber, the spotlight guy, the one girls chase after. Keith Richards, on the other hand, was never any of that. Their solo catalogs only make these distinctions clearer. On the surface, Richards' successes were the most surprising. He isn't much of a singer. He isn't much to look at. He isn't even that much of a guitar player, really — more scroungy tics and oddball strums than virtuoso. But as the following list of his most underrated songs shows, something emerges that's often bigger than the sum of those parts. Conversely, there's a rangier feel to Jagger's records, often in direct opposition to Richards' steely focus on the rootsy influences that always animated the Rolling Stones. Jagger tends to dabble along the margins of his muse, taking the opportunity to try on different genres while working with a series of guest stars.