2022: Just updating this as it was 20 years out of date. Retirement is now scheduled for this year, and the offspring have fledged. Melodeon is probably still my first instrument in terms of ability, but I am actually playing the Anglo (Jeffries/Crabb 36 key) more than the Melodeon these days.
I mainly play English dance music on both the melodeon (in a band) and the concertina (strictly for my own entertainment - so far). Starting to get into singing a bit as well.