I just finished MSQ

[Vahlnir]

I have to disagree with it being a lil' bit soon to say. :P ShB made me more emotional and engrossed in its storyline in the first couple of hours than the majority of SB's. What's more, I found myself invested in the characters I once merely tolerated. I have never been so eager to see what happens in the .X series. ShB has firmly established itself as best MSQ for me.

Yep, pretty much the same for me here. I was pretty disillusioned as far as the Scions were concerned for the longest time. I didn't really like any of them even from the start of ARR and my feelings carried over to Heavensward and Stormblood. Shadowbringers changed that. They felt like actual companions, friends even. And I enjoyed their company through the MSQ. Every last one of them. And I was engrossed in the story from beginning to end. Shadowbringers is already the best for me, hands down.