I love Castle and Criminal Minds! I've been watching Criminal Minds since it came out, despite my mom's attempts to keep me and my sister from watching it because it was too creepy for eleven year olds. haha
I like crime shows that have a seasonal arc instead of just individual cases each episode. My favs are Prison Break, 24, and The Wire...all are older shows (no new episodes) but I'm a little behind on my tv.