Mine are all around my faves really
Nikki wouldn't have gone in week 8 and would have lasted until the final in BB7.
Or, Emma wasn't ejected after Fight Night in BB5,
Or, Chanelle had walked before Charley was evicted so the eviction was cancelled and Charley would have lasted at least another 2 weeks due to the Halfway House twist in BB8.
I would have also replaced Ulrika with Charley in UBB.