I'll go with The Sopranos.

The Wire went off the rails a bit in Season 5 with the main storyline.

I could never really get into Breaking Bad,

I think you can accuse The Wire and Breaking Bad of being unrealistic at times, moreso than The Sopranos.

The Shield was hurt, in my opinion, by the censorship. No bad words? come on...

I invoke my right under the 5th amendment of the United States constitution and decline to answer the question.