Much to my own surprise, it's the new bloody Turnstile.
After seeing a live energetic performance around 5 years ago (my pal had a ticket going spare), I warmed to the EPs but had never got into the swing of the two LPs that came after. Even then, my appreciation was so so. After initially not recognising how good these songs were, the album sampler EP - Turnstile Love Connection, worked it's magic on me.
I just know I will be listening to this album in 30 years time and it will make me feel young.
It's got pop-punk, grunge, hardcore, thrash, beatdown, indie, electronica, shoe-gaze, nu-metal going on and a bunch of other stuff going on that I've probably not yet worked out.