writers' favorite character was in the Criminal Minds fandom--we all liked Reid. Back in my days of devouring Stargate fanfic, I was also lucky in that writers seemed to favor Daniel...he was also my favorite. There's a lot of Jack/Daniel slash out there...I've read some of the tamer stuff and was undecided because on the one hand, they're both beautiful men who have a strong bond and are unattached (after Daniel loses his wife, anyways), but OTOH, I sometimes got a father/son vibe from them and...ick, no.
I used to watch the Dr. Who spinoff Torchwood. I actually liked the Jack/Ianto pairing quite a bit but had to give up on the fanfic because the writers were SO obsessed with "Janto" that literally 98% of the stories were just the couple finding new and exciting ways to bang each other.
