My first culinary memory involves a surreptitious finger dip into the Marmite jar at the age of three; it is the first food I remember really loving. And ever since then I have had difficulty getting enough of it.  Not everyone reacts to it the same way.  Some imagine it looks too much like axle grease.  Others complain that it smells too much like beer left overnight  to go bad.  These facts suggest that one might only serve it to close friends and only when there are some alternatives. In any case, the Marmite claim "Love it or Hate it"  is quite apropos.  It rarely evokes a neutral reaction.