2017 was the year of the collaboration. This writer in particular thought we would see a wave similar to this following Drake and Future's What a Time to Be Alive, but the muted reception to that effort may have delayed the trend for a few months. However, now it's as if artists have finally realized that in the age of social media, it may sometimes behoove them to join forces rather than stay in their own respective lanes. This ideology was adapted by countless acts over these past 12 months and has lead to over half a dozen exciting - and sometimes just downright confusing - pairings. And while Metro Boomin rightfully deserves his props for producing an album for damn near everyone (Gucci Mane, Nav, 21 Savage & Offset, Big Sean - the list is truly endless), it's the genuine chemistry between two different rappers that we wish to highlight for this list. 

Because, let's face it, while some of these recent projects looked fantastic on paper, fans soon realized that "on paper" is where the idea should've remained. Since the iconic release of Watch the Throne back in 2011, no single collaboration between two otherwise disparate rappers has garnered nearly as much critical acclaim. The closest, for those paying attention, may have been Rich Homie Quan and Young Thug with their cult classic, Rich Gang: Tha Tour, pt. 1. But that was lightning in a bottle, caught by the most uniquely talented A&R in the game, Birdman; nowadays, it's as if execs are scrambling to reverse engineer what should be a natural phenomenon. 

But it's not all bad - for all the middling efforts we've received, there are quite a few projects we've all been guilty of letting slip under our radars. Check out the list below for our seven most underrated collab tapes of 2017, and make sure to let us know which others from this prolific year top your list!