You may have one from a number of different genres so XYZ is your favourite Southern Rock band and ABC is your favourite Metal band, and 123 is your favourite POP band- but stick to bands and not individual artists :)
Can you give me 30 years to make a list please ?
When I first typed that out I thought this would be nice and easy to do... BUT now I think about it, oh boy! I think I am going to do this one post at a time, each looking at different genres (although will try and do just a couple of genres and one pop band otherwise I could still be here next week lol). Posts to follow!