I'm going to go with the series that I've seen at least bits of.
BB2 - Brian
BB3 - Jade
BB5 - Victor
BB6 - Makosi
BB7 - Nikki
BB8 - Charley
BB9 - Luke
BB10 - Freddie
BB11 - Tbf I have to say John James.
BB12 - Aaron
BB13 - Deana
BB14 - Gina
BB15 - Helen
BB16 - Probably Jack, it was one of the duller years though tbh.
BB17 - Hughie
BB18 - Raph
BB19 - Lewis F - How could I ever forget his presence on this series?
CBB:
CBB5 - Jade
Hijack - It's between Victor, Jeremy & Emilia, I'll edge towards Victor.
CBB6 - Coolio
CBB7 - Vinnie
CBB8 - Jedward
CBB9 - Frankie
CBB10 - Julie
CBB11 - Joint tbh between Rylan & Speidi, it was their year tbh.
CBB12 - Charlotte - How could I forget?
CBB13 - Luisa
CBB14 - Gary
CBB15 - Katie Hopkins
CBB16 - Austin - He had a very memorable vocabulary.
CBB17 - Stephanie
CBB18 - Bear
CBB19 - Jedward
CBB20 - Sarah
CBB22 - Hardeep Is Your Love