Originally Posted by DeathscytheVII
This is actually kinda complicated. Since Hitsugaya's explanation on the arrancar kinda imply that all the arrancar are made from Menos Grande type hollows having their masks ripped off.
And Menos hollows are formed from a bunch of hollows merging together. So by that extension, i'm assuming that for all the dead arrancar, when they are cleansed into soul society, they split back into the souls that made up the menos hollows in the first place, and so the personality of the arrancar is destroyed.