Bob the Drag Queen was probably about equal in terms of my favourites with Betty and Thorgy so I guess that counts.
CBB: Julian Clary (Katie Price was a close 2nd behind Patsy Kensit)
BB: Nadia Almada and Kate Lawler are the only times it's happened
The Apprentice: Tom Pellereau
X Factor: Alexandra (Louisa was 2nd behind Anton, I'd have probably liked Little Mix the most though but I didn't watch that series)
I'm a Celeb: Stacey Solomon
I did want both Pop Idol winners to win... and Girls Aloud to win Popstars the Rivals... (don't remember my preferred 5 but don't recall caring about Javine so...)
Drag Race: only Bianca, Bob and Bebe were favourites of their series.