In fairness, in the first episode or two, it
does looks pretty shoddy (there's an awful camera zoom that always bugged me in episode 2, and the angles are just generally off for the first few eps), and McNulty's accent is terrible in places for the first season. And Daniels seems like an incredibly stiff actor but is in fact an incredibly stiff character.
I only just started watching it again recently (am actually about to put episode nine on right now), and it is a bit ropey in places, I'll admit. But it still becomes fantastic, and as Carzy said, if you don't like it by the end of the first season (come on it's only 13 episodes), you're wrong in the head.
Mind you, I'm not sure I get how anyone can watch through the chess scene ("This the queen. She smart, she fierce") and not be getting it, but I guess it's still early days. I mean, hell, barely any Bubbles, or Omar, or Stringer Bell yet? Or McNulty and Bunk getting drunk together? That be the good stuff right there.
EDIT: Let me put it this way. There seem to be several people who have given up after the first few episodes. But on the other hand, I've never seen anyone go "Yeah I watched the Wire to the end, it was ok, but not great." Everyone who's seen it all thinks it's one of, if not THE best show on TV, by far. Have some perseverance, people.