Ah that's interesting. Where do you get the good stuff? Have you seen all the Harry Potter movies and read all the books? Which characters are your favourites?
Small, specialist shops which sell fountain pens (and other good quality pens), often sell good quality paper as well. Paradoxically, in the former communist world, I have noticed that the quality of the paper in ordinary note books, or copybooks, tends to be excellent.
No, I have not seen all of the (HP) movies, but I have read all of the books.
Re characters, I love the story arcs of both Albus Dumbledore and Severus Snape. In stories of that sort - the Lord of the Rings is one of the obvious sources of inspiration for one of the strands of HP - the Guide or Mentor character, who reveals and guides the eponymous Hero to his (or her) destiny, must somehow be removed from the plot before the final conflict/resolution, for the Hero must face the final conflict alone, having taken the entire length of the series to grow into his (or her) role & strength, protected, guided and advised by his (or her) teachers/guides while learning to do so. Only at the end is the Hero strong enough to be able to face his (or her) destiny with any sort of equanimity and the necessary skills (painfully acquired) to do so successfully.
Thus, I had been expecting the death (or incapacitation, or removal from the plot) of Dumbledore to occur somewhere in the final three books - in fact, it would not have surprised me to have seen it happen at the end of the Order of the Phoenix, and, when it didn't happen then, I was certain it would happen in the following book (Half Blood Prince), which, of course, it did.
However, one of the interesting things about the series is the clever and layered and nuanced narrative skills brought to the task by JK Rowling. Normally, in a story of this kind, I would have expected Dumbledore to be the stock, almost clichéd, 'wise mentor' - the standard Gandalf type - character, but, in the final book, he became so much more, when his backstory was given which rounded out his character exceptionally well. His back-story - and even more so, - that of Severus Snape, are, to my mind, the real triumph of the final book of the series and act as the sort of moral heart - and moral compass - of this superbly realised universe.
In fact, to my mind, that last book - Deathly Hallowes - (so often a sort of anti-climax in an otherwise excellent series) was an absolute tour de force.
Naturally, I really liked the trio, especially Hermione; it is always refreshing to have an intelligent and strong female leading character in a work of literature. Needless to say, I also liked Neville and Luna - and have liked both all the way through the series. Professor McGonagall and Remus Lupin - especially his sensitive thoughtful role in Prisoner of Azkaban - were also favourite characters of mine.