The first year he was on - the year that Hazel was on normal BB - I remember his segment was really interesting because he was analysing the housemates' actual dancing from one of their party nights. It was witty but also seemed to be well observed and insightful.
SInce then, all this 'If Keith were a dance, what dance would he be ?' stuff is meaningless. Emma obviously adores him, which is quite funny to watch, but the clever psychological observation bit has gone out the window.