Haven't been asked that recently, but one answer I've given a lot - especially if it was for some sort of media, is that I'm a Joe Gould Buddhist. Joe Gould was a Greenwich Village Bohemian in the forties and fifties. He was a writer with famous poet friends who either just wrote one poem or, of his writing, only one poem survives. And it has gained some fame. There was a whole movie about him and this poem was the tag line. Here is that poem:
In the winter I'm a Buddhist.
In the summer I'm a nudist.
For more on Joe Gould, go to this DC report on the April 1, 2006, St. Stupid Day parade in San Francisco.