Anyway, I haven't yet been to the Museum of Everything or the Johnson Museum of the Odd (though I have been to Pitt Rivers in Oxford, which is awesome) but the best museum I have ever encountered has to be Dennis Severs House near Brick Lane in London.
(Image from www.timeout.com)
Dennis Severs, an artist, brought the house in the 70's and created the home of the ficticious Jervis family from the 18th and 19th century. Walking through it is as though you're chasing the past and its inhabitants...
At Christmas they recreate Christmas past with their Silent Night events... GO! Take everyone you know! It's SO GOOD!