I don't have a one all favourite band in the universe, there are many very special bands.
As a very young child the band which had the most momentous affect for me in regard to music were definitely the Beatles. When I heard their hit singles nearly all other contemporary music simply ceased to exist for me. It may be something to do with the period in which they started and I don't think any other band to date had such a hysterical intense reception as the Beatles (especially their tour of USA)