Good on you, Mary T ! My favourite is Giselle, the first ballet I ever saw, because , properly done, the key scene in the first act is so moving (and not, as my cynical friends said 'because it's the shortest classical ballet!') Ballet can be expensive to watch but provincial and touring ballets can be very good value, if only because they can perform without a live orchestra and vast , expensive sets.In London there are bargains to be had. 'Friends of Covent Garden' get priority bookings and may get some discounts. If you're young enough you should get proper discounts as a Young Friend.Haven't investigated recently (!) but when I was a lad, forty years ago, you could get a place in the 'slips' and 'upper slips' , right up in the gods, at Covent Garden,when the ticket was 8 shillings and sixpence and the discount was ten shillings (but I never had the gall to ask them to give me the difference of one shilling and sixpence for going!) Days long gone, but no doubt there are still 'cheap' seats available