I'm playing HoMM 3 and MM7.
Both some of my favorite games of all time actually.
Only played/loved HOMM 2 and 3.
Yeah after 3 the franchise was meh for me. 4 was bad 5 was okay at best and I have not played 6 enough to get much of an opinion but there is a lot to be desired and it is buggy as hell.
The upgraded griffin cannot even divebomb correctly. Have not touched the game for awhile(since Skyrim came out) so idk if there have been any patches.
Only Might and Magic game I played was Dark Messiah of Might and Magic, it was ok but I should have rented it first.
That was one of the worse games in the series. It was WAAAAAAAYYYYY shorter than the orginal games. Comepletely unrepresentative of the franchise as a whole. It was okay at best. More of an action game than anything.