[quote=@Maxwell]
I don't remember any major change in their personalities, and I only read the series the other week. At best, I got the impression that they could set aside their worst tendencies if it were really important - except the Thompson sisters were always strictly business in combat.
[/quote]

You don't remember the long speech Tsubaki gave about no longer being a scentless flower and saying she would do what she wanted and speak her mind.  Or when kid's view of world order was completely shifted after being stricken with madness by the great old one, signified in his later decision to wear his band asymmetrically to recognize that true order wasn't stagnant and unchanging and putting away his desire for a perfectly symmetrical world?

Edit: In saying that I just remembered that Kid had them redo his coronation ceremony over and over for a full hour because Maka's dad kept putting his mask on a centimeter off.