Who didn't you like as an actor..,?

Couldn't disagree more...

I don't think any of the regular actors are bad at all, but there are a few weaker links if you look close enough.

Here's an insightful bit from Kent Jones on the various actors of the show. I agree with him that some actors, like Reddick and especially Turman and Sohn, are a little one-dimensional compared to the best of the cast:

"Most of the acting on The Wire is unusually good, though there's a broad spectrum of talent, style and creative intelligence. Dominic West is a little too sunny for the maniacally obsessive detective he's playing, but his ebullience makes a good fit with McNulty's contrite side and with his cockiness. Aidan Gillen leans into the voracious politician Tommy Carcetti like a mariner heading into a gale, an all-forward-movement performance, while Clarke Peters' detective Lester Freamon is a sedentary piece of winningly hambone stoicism. Clark Johnson does some nicely textured work as the Sun's city editor, injecting little bursts of invective into his character's relaxed surface, while Wendell Pierce's detective Bunk is the kind of authoritative character performance one used to see on a routine basis from Vincent Gardenia or Yaphet Kotto. Sometimes the actors enliven the characters, as with Seth Gilliam as the street cop Carver, a fascinating actor who shifts between states of tension and occasionally swan-dives into soliloquies of paternalistic authority before the corner kids, or Amy Ryan, who shades an unusual amount of emotion into her quietly grounded port cop. Sometimes the writing carries the actor, as with Glynn Turman, who heaps too much bullsh-t all over his Mayor Royce, or Sonja Sohn as detective Kima Greggs, a genuinely monotonous actor who tries to make her limited repertoire of head-bobbing exasperation and hip-hugging indignation suit every situation.

Each of these characters would be fodder for a superior cop show, but they become truly interesting when placed within The Wire's vast social web and in the context of the depiction of police work as blue-collar drudgery - one episode ends with an entire investigative unit racing to type up a mountain of paperwork in order to meet a deadline for a search warrant. Only John Doman's 'Deputy Ops' Bill Rawls, Robert Wisdom's Major Bunny Colvin and Al Brown's Stan Valchek stand out as wholly original creations. Lance Reddick's Lieutenant Cedric Daniels is also quite captivating, a striver with a couple of skeletons in his closet who rises to the top on the strength of his police work alone. Reddick's effort to maintain a stiff-backed dignity can be very touching but I wish he had a few more arrows in his quiver: every other word comes out with a whoosh, as if shot from a catapult."

http://old.bfi.org.uk/sightandsound/feature/49447

none, the acting is flawless.

Three actors who kind of irked me and why:
Frankie Faison as Commissioner Burrell - too wooden, pauses at unnatural, irregular moments in speech; felt like he was focusing too much on reciting his lines.
Anwar Grover as Slim Charles - good character, wrong actor to play it. Like Burrell, too wooden in delivery.
Isiah Whitlock Jr. as Clay Davis - histrionic overacting, much in the Jack Nicholson vein.
Other actors who had ups & downs were Sonja Sohn as Kima Greggs (some of the more "up close & personal" scenes with her are not very believable) and Lance Reddick as Cedric Daniels.
My take!

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This thread is hilarious. People complaining about characters thinking they're complaining about acting.

I think everyone was great, although I could tell snoop and slim Charles weren't professional actors, I still loved them in it.

Dominic West is the reason I rate this show a 9/10 instead of a 10. He's never impressed me in any of the ten or so projects I've seen him in, even UK ones where his mediocre US accent isn't an impediment. Despite that I still rank it as the best TV drama I've seen.