Been wanting to dive into OLED for the last few years but there were too many shortcomings. I think 2018 has finally delivered some sets that are just about there. After loads of agonising research I've gone for the LG C8 55, which will be the best 'all rounder' for my wants - in no order - gaming, HD broadcast TV, Netflix, Amazon etc etc. So then, I've not set it up yet, and as an OLED virgin, what's the first thing I should watch to validate my purchase!?