You should like my girlfriend, she got bored half way through, dropped Sopranos after 4 seasons because it was too slow, I think she lasted 1 season of The Wire that said I know what you mean, it's slow but I find it good none the less.
I got half way through the 2nd season of the wire before ditching it Sopranos, I can watch multiple times though
Only seen snippets of boardwalk, may have a look at it over the weekend