I think Lincolnshire is herby - when you buy posh linc sausages they are. My favourite is Cumberland, with plenty of black pepper and made nice and chunky. But you can make your own mix and experiment with all sorts of flavours, such as chilli or apricots with north African spices, or apple or leek.
I make mutton sausages and have various recipes, including the above plus Herbes de Provence which goes very well with mutton.
I make a dry loaf with spelt flour then crumble it when it's stale and add that to the meat - you can use less than there is in commercial mixes. White or mostly white flour is best for sausages. Or you could use a commercial mix but customise it with some extras for part of your meat.