I'm pleasantly surprised it worked as well as it did. The MCU has had a major problem giving us compelling villains (in 10 years and roughly 20 movies, we got two: Loki, and Killmonger), and based on his appearance in GOTG, I wasn't sold on Thanos in the MCU. In IW, though, Thanos lived up to the hype. On the one hand, we of course don't want him to succeed, and are horrified by his methods, but on the other hand, it's easy to understand his perspective, and why he desires to wipe out half of all life: On a macro scale, he's not being disingenuous when he calls it 'mercy'. I mentioned this in the general movie thread, but this was my only real nit to pick after my first viewing: Spoiler 'Giant-sized' Peter Dinklage didn't work for me at all. That whole scene was a fourth-wall breaking moment, for me. He's too recognizable, and they didn't do a great job with the forced-perspective shots, either.