We've all had it
When I was with Bad Horsie, occasionally we'd get requests for songs, and some of them were pretty good ones that we hadn't thought of.
However, just occasionally, and bearing in mind we specifically took chart songs and metalled them up, we'd get the odd "expert".
"You're alright you lads, but you should play some Sabbath and DC". Yes. Because that'd fit RIGHT in with the Tiffany, Stranglers and Kraftwerk you just heard us play mate.
But the oddest "critique" I ever got was in Scarborough at the Leaking Boot with a Lizzy covers band after having played Still in Love with You. Apparently I was on the wrong side of the stage to play the first solo.
Bearing in mind I was playing a metallic violet Ibanez RG through a Mesa Boogie combo, which as we all know is that classic Lizzy combination.......