We often have them to use up leftovers from a joint of meat. The world is your oyster when it comes to flavours, there are a great number of spices that can be used to enhance them. I just love them especially ones made with ham and also a beef version with Cajun spices.
Home-made fish cakes are another favourite of mine, very similar to make just use fish instead of meat.
Beats all the convenience pre-packaged gunk make from reclaimed meat and fish pieces, and far cheaper, it just takes a bit of time and effort to prepare them.
We bought a large ham joint at Christmas the remains are in the freezer waiting to make into rissoles, can't wait. If one looks at the cost of the ham and the number of meals we will got from it, the cost is not excessive, bearing in mind that the ham joint certainly cost far less than just one meal of fish and chips for 4 from our local chippy.