Good cider is in the apple mix, my friend. You could try mixing the apples you get with some sweeter juicier apples, as most good cider, imo, is a blend of bitter and sweet apples. Ageing is one of the best ways to change the flavour to a pure apple cider too, both in the length of time and the carboy used. You can age in glass, or add some oak chips to give a woody, vintage flavour - even soak them in bourbon for a few weeks prior to adding will make it much tastier. Look into what types of sugar give different flavours for some inspiration - honey and light brown sugar are both fantastic. Naturally, you'll want to check out the apfelwein recipe on this forum - the reason its such a favourite is because its so damn good. I own a book called 'making cider' that is based purely on making cider from fresh apples so if you have any idea what sort of flavour youre after, let me know and ill copy s recipe here. Best of luck to you mate!