Riffs, for the uninitiated, are short, repeated musical phrases. Popular among the heavy metal fraternity, but employed by musicians in virtually every genre.
In fact, it's hard to imagine rock, jazz or even electronic dance music without riffs (or ostinato, if you're classically inclined). A good riff can be an extremely simple rhythmic or melodic figure – or a dizzyingly complex refrain. Riffs provide a structure over which improvisations can hang and collide.
Entire songs can be built around a riff – and this week, we're looking for these. There are rather a lot of them, so don't bother nominating songs that might feature a riff but not as a central feature.
Let us know your favourites by posting a comment below, and we'll gather some of the best ones in a playlist next Thursday.
* If you can think of a good theme for Readers Recommend, please email jon.dennis@guardian.co.uk
* Listen to others' suggestions and add yours to a collaborative Spotify playlist
* Guide to "donds", "zedded", and other strange words used by some of the RR regulars (courtesy of the Marconium)
* The Marconium (blog containing a wealth of data on RR, including the songs that are "zedded")
* The 'Spill (blog for the RR community)
Please do:
* Post your nominations before midday on Tuesday if you wish them to be considered.
* Write a few lines advocating the merits of your choices.
But please don't:
* Post more than one third of the lyrics of any song.
* Simply list your nominations. We want to know why you like these songs, and why they're apt for the theme.
