I'm floored by Madonna's 80s-90s discography 
 
Holiday, Into The Groove, Like A Prayer + Virgin, Material Girl, La Isla Bonita, Borderline, Open Your Heart (!!!), Vogue, etc. I hate when people ask for all the hits on tour and no new album tracks, because I think it's so important to respect what any artist or musician is doing 
currently - away from their #1/'s and most known work. I know it haunts some acts forever, when everyone just wants to hear their two hits. That being said, I'd kill to see her do a 'Mrs Carter' and tour next without a new album, so we skip the new material and get straight to the hits in something close to their original form. I know life-long fans have dealt with the same version of songs for decades and appreciate something new, but the way she did songs like Open Your Heart at the MDNA tour is just criminal to me - I want to hear that groove, the horns in the chorus, the racing tempo and refreshing refrain, etc. 
 
I know tonnes of her music, but want to familiarise myself with her full body of work from the 80s, before pushing through from Erotica to American Life (which bar a few singles, I know nothing of). I'm excited!