I think all programming should be functional. Programs that don't work are a pain. *g*

(My maths lecturer in 6th form had a story about that. A physicist and a mathematition -- who could have been him, but I don't remember for sure -- had a long discussion about 'function', and were both agreeing that it was a very good thing. Half an hour or so later they realised that they meant completely different things by the term...)