Might as well make a list.
Males:
Adam (BB13)
Christopher (BB15)
Females:
Lydia (BB13)
Shievvone (BB13)
Lauren (BB13)
Caroline (BB13)
Deana (BB13)
Jemima (BB14) - QUEEN JEMIMA!
Gina (BB14) - I'm 60/40 on her, but she was a decent housemate, not going to lie)
Hazel (BB14)
I liked Helen, and Toya, from BB15. But I feel it's inappropriate to put them as my favourites on C5, they're more like loose honorable mentions from the terrible BB15.