A couple stand out.
One was a radio play named "A Call of Nature" (I don't know who wrote it). Intriguing stuff, set on a barren, Scottish coast.
Another radio play by Coin Free (who won an Emmy for his "Rush" TV series was "What Women Do on Thursdays". You wouldn't believe what they got up to. And, no, it isn't at all what you're thinking.
"Shirley Valentine" (the play, not the movie) was great. The movie was well done but they edited out the best line in the whole play.
And a few of the classics stand out, especially those by GBS and Oscar Wilde.
But I suppose my all time favourite would have been Marlowe's version of "Dr Faustus".