oh dear oh dear oh dear
Yes, you MUST try again. 😛 The trick is finding the right ones to start with…the earlier ones you generally appreciate more once you already firmly entrenched in the fandom. But you also can’t just start in the middle of an arc (the Dicsworld series consists of several major, mostly disparate story arcs), – I think Hogfather is one of the later Death ones, with Susan Sto Helit… That is probably why you didn’t like them so much.
My recommendations: start with either the Witches arc (starting with Wyrd Sisters, Witches Abroad, Lords and Ladies, and on) or the Death arc (starting with Mort, Reaper Man, Soul Music and on). Check the Wikipedia entry on Discworld for more info – they have a full list of all the books and what arcs they are part of.
Let me know if you like them! ^_^