Yeah, most of the characters are pretty awful on the Walking Dead. Lori, especially, is probably the most unlikable female lead I've ever seen on a show. That being said, Daryl, Rick, and to a lesser extent Herschel, Maggy and Glenn are good enough characters to keep me watching, especially considering it's one of the few TV shows that can genuinely surprise me anymore, and I love my zombie headshots.
Sidenote: how did everyone get so good at shooting zombies? I mean, I get them being good at using guns from Shane and Rick's training, but they get a headshot pretty much every single time. Even Lori, the most useless woman on the planet is an adequate zombie-hunter. There was even an episode with Andrea learning how to shoot them zombies and totally sucking at shooting moving targets. When did freaking Carl get this lesson? How did he go from being too afraid to shoot a zombie, point blank, stuck in the mud to shooting his best friend in the head, at night, over his father's shoulder? Other sidenote: how many rounds does Herschel's shotgun hold? Other OTHER sidenote: Why do zombies get the jump on so many people? How come they never realize that a slow, growling, thumping monster is right behind them?