Everyone can change their opinion. You can like someone (example Nicole on bb16) and not like her this time! I liked her in bb16, but cannot stand her this season.
Another example of change. Roxxxy Andrews on Rupauls Drag Race, hated her on her season, I AM LOVING her this time!
I hated Danielle on Season 8. Loved her on 13.
I disliked Frankie on BBUSA loved him on Celebrity Big Brother.