I voted Future Lovers. I can't really put my finger on why TBH.
As far as Sorry is concerned, i think it's a fantastic song, and it hit number 1 here in the UK (GT got to #7, J got to #9). I prefer it over Hung Up and Get Together personally (i prefer the demo's of GT over the final, album version), but hey, that's just my opinion 😊.
In terms of the whole album, i know it gets some stick, but i really like it. It's not her best at all, it's like a 7/7.5 out of 10 for me. It's just that some of the other albums are 8, 9 or 10 out of 10 for me.