Any show with a cold open and Cheers, which also often had a cold open. Watching a Cheers cold open featuring Coach followed by the theme makes me feel (for a little bit) like a child and everything is going to be okay.
A different recording was used each season. Versions, in series order, were recorded by The Blind Boys of Alabama, Tom Waits, The Neville Brothers, DoMaJe, and Steve Earle. Season four's version, performed by the Baltimore teenagers Ivan Ashford, Markel Steele, Cameron Brown, Tariq Al-Sabir and Avery Bargasse, was arranged and recorded specifically for the show.[4]
Unforgotten, Versailles. Downton Abbey, The Waltons, Happy Days, Laverne and Shirley, Beverly Hillbillies, Gilligan’s Island, Brady Bunch, Patridge Family, Mary Tyler Moore, Green Acres
Stardust crusaders (JoJo's bizarre adventure S2&3) because it's cool AND they do something really neat with it (It's related to the plot so I'm trying to avoid saying too much)