My mother thought Bolero was great. She thought Tristan was morally disgusting. I haven't listened to Bolero in many years. Tristan - I have a shelf full of recordings.
Toscanini was at a performance of ‘Tristan und Isolde’ and during the 40 minute love duet in Act 2 he turned to his wife and whispered “If they were Italian they would have three kids by now but they’re German so they just keep talking about it.”