Julie vs Coleen - it was amazing in CBB10 cause it lead to Julie's prized servant Julian trashing Coleen but it's ultimately ruined by Coleen ending up the third worst CBB winner a couple years later.
Speidi vs Rylan - this was engaging but it took up way too much time in the season to the point of reducing any point most of the other housemates had cause it was essentially the "Speidi and Rylan" show
Luisa and Linda vs Jim - it was great to see two people repeatedly call Jim out on what a nasty shady **** he is but it's ultimately ruined by the public being gullible fools for the 5334242 and handing him the victory
Audley vs James - a great rivalry all in all but it was lacking in highs
Perez vs Katie - see Rylan & Speidi
Natasha vs Farrah - Natasha was very much in the background so this one is one of the least interesting. Farrah vs James was much more of a recurring thing
Gemma and Danniella vs Stephanie - iconic like almost everything about the best CBB, being 17.
Renee vs Voldemort - i don't enjoy watching an innocent woman being picked on and screamed at to the point of her self-destructing and breaking down in tears while her attacker stares her down like a true scumstain i'd wipe off dog ****.
Kim vs Nicola - an amazing rivalry but because Nicole was the villain, Coleen winning once again completely sours it as Jedward or Kim winning would've been a far better payoff
Sarah vs Jemma - this is pretty okay i guess.
Anyway my vote goes for Gemma vs John CBB17