I love Just A Minute and ISIHAC as well, but Enfield eludes me. He started out with routines that were funny, and then seems to have decided that all he needed to do was don a costume, put on a voice and utter a catchphrase and everyone would fall about laughing every single time. ISIRTA did that with "teapot" years ago. I seem to see also the beginning of the edge of cruelty in his work that comes to full fruition in Little Britain and such.