The first 3 seasons were good. Although, overall, 1 and 2 was better than 3 - but I loved Gyp Rosetti's character even though he was a tad bit over the top. Bobby Carnavale played that role.
I liked that Season 4 gave Michael Williams (Chalky) a larger role, but that whole Dr Narssie and Daughter storyline was boring and dragged out. Chalky was so family orientated yet he abandoned he's family for a piece of tail. The man did not even visit them when he came back into town.
Loved Richard, Eli and Al Capone and Van Alden's characters and the actors who played them.
Luciano, Lansky, Bugsy and Rothstein should've been killed long ago, or their role diminished greatly. They dragged the show down IMO. Hated them all.
Tommy killing Nucky was okay ending, but the kill should've been Gillian's.
Season 4-5 are a drag on a good show.