I've been watching my way through 3 seasons of Dexter & I just finished. I loved this show! I can't believe the quality of shows coming out of Showtime now. Dexter Morgan is a blood splatter analyst for Miami Metro. He's also a serial killer. But aside from the killing, he's a really nice & likable guy. He's a good brother, a good boyfriend, a good employee, & a good substitute father for his girlfriend's kids. You really like him, which is what makes the show so interesting.
I've been a fan of Michael C. Hall's since Six Feet Under. I'm so glad to see him in something else. I didn't know this, everyone else might, in real life he's married to Jennifer Carpenter, who plays his sister on the show. A little weird, yes, but also cool.
If you haven't seen Dexter, I highly recommend it. Meanwhile, I'm eagerly awaiting the DVD release of Season 4.