These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Black Donnellys
Cargo Ship: Kevin/his jacket, Kevin/cereal, and Kevin/Sean's car have their supporters.
Crowning Music Of Awesome: Snow Patrol's "Open Your Eyes" played at the end of the pilot, in its entirety, to a montage of Kevin and Tommy killing the mob bosses, Jimmy being arrested, Sean in the hospital, sad Jenny, and Joey Ice Cream narrating.
Even better is the unaired version which used Arcade Fire's "Rebellion (Lies)."