I love Isles, she's adorable, and much more personable than others in the genre, notably Dr. Temperance "Bones" Brennan. Ugh!Oh yeah, the books are amazing! And when someone asked Stephen King what he reads, the first thing out of his mouth? Tess Gerritsen! But Dr Isles is a bit darker character, in the books... still nice, but kinda... creepy. "Dr. Death"
My wife and I (mostly her) watch a lot of TV. Usually TNT, the rerun cycle of Charmed - Supernatural - Bones - Castle, then new shows like Major Crimes and Rizz&Isles. I'll get "into" a show just because it's on (she went through a phase with Drop Dead Diva - ugh) but of those Castle and Rizz&Isles are "my" shows. And there is (was) so much crossover potential there - imagine the Winchesters meeting the Halliwells, or Beckett consulting with Bones (Beckett was working in D.C. for half a season for crying out loud!)
Of course, if the TV watching was really up to me I'd likely be watching Planet Earth at any given time. I always forget which Attenborough is which, but I love em both!