I wish I had a magical selector that would allow me to skip through all the sections I don't care for. Not that I particularly do not care for any of the storylines, I like them all, but sometimes when you've already seen the episodes and you're in rewatching mode, maybe you don't care for what happens to Dany in Essos (basically nothing for 6 seasons until she drags her butt to Westeros... haha, just kiddin'), so it would be nicer to stay with Westeros.
Also, it would be interesting to watch all the storylines apart - seeing only Westeros, only Essos, only jon at the Wall... just to get a better feel of what it's like for the character to live in their own reality, while stuff that happens elsewhwere doesn't touch them and gets told only through ravens.
For absurd - imagine that you'd be able to show someone only the scenes in King's Landing, which alore are worth a show of its own, and then after 5 seasons of that "would you like to see scenes set in the north where a bunch of guys dressed in black patrol a Wall built because of old myths?"... probably someone wouldn't care, and everyone in King's Landing don't care either, but they should 'cause the White Walkers are real and they're coming to kill everyone!!!