Avengers.
I used to LOVE GoT, but when it's quality dropped a few seasons ago and it started to feel more like it was reveling in the misery of its characters than actually being entertaining, that's when my interest tanked.
To their credit they definitely improved things, but I've never gone back to my original interest level in the franchise.
Didn't watch the last season for quite a while after it finished airing (only managed to have one thing spoiled which wasn't too bad).
Me watching this final season will be more because of a feeling of obligation rather than actual interest in how the show will end (and I would be incredibly surprised if the books ever conclude).
I get a little bored by the "samey" nature of a lot of the MCU movies (but still enjoy them overall), but Infinity War was incredibly enjoyable, one of the few times I haven't been let down at least a little by a big budget movie in a long time.
Felt like such an incredible culmination of all the previous MCU movies, and I'm really excited to see how it concludes with Endgame.