Ok, I'm caught up a bit.
I like McCreary's work on BSG but to be honest I haven't really heard a lot of his other TV scores, though I wouldn't be surprised if there were similarities because most composers have motifs and sounds that you can track to them.
Horner, Goldsmith, Williams, Zimmer, John Powell and Micheal Giacchino all have (or had) certain little bits that often kind of signify to the viewer when your listening to some of their work.
'If the Apocalypse starts, beep me!' - Buffy Summers
'The sky's the limit.....' Jean-Luc Picard, 'All Good Things'
courtesy of Saquist