Well considering that the books have sold over 450 million copies and the movies have made 7.7 billion dollars I'm guessing that you will find a lot of people that like/love Harry Potter. Personally I think the series is the greatest piece of fiction ever written (IMO the only thing that compares is The Lord of the Rings), and the movies are up there in awesomeness with Star Wars. I've read most of the books multiple times but all at least once. I've never been a huge reader but Harry Potter is addicting. I started reading the series when it was coming out, stopped reading after Order of the Phoenix, and finished the last two just this summer. The movies I've watched irregularly. I watched the first 2 soon after release on dvd, saw 5 and 8 in theatres, and have watched 3 and 4 on ABC Family (loving the marathon on now btw). I actually haven't seen 6 yet, but I ordered the dvd collection and it is taking forever to get to me (so thanks again ABC family for holding me off).
The movies can be frustrating at times for someone who really likes the books, but overall they are really cool. I like comparing the movies to Star Wars because they are a cultural phenomenon and don't really receive the critical recognition they deserve during their time (Episode IV did win 6 Oscars but not best picture and V won an Oscar). Star Wars is one of those movies that usually gets mentioned as one of the best ever, some people consider Empire Strikes Back to be even better, and Return of the Jedi might not be quite as good but it is one of the most epic things ever. None of the Harry Potter films have won Oscars, but all of them have been well reviewed especially Prisoner of Azkaban and Deathly Hallows Part 2. All I'm saying is that these movies are the visual representation of what I believe to be the greatest story ever told. They won't win big awards, but when I have kids I'll be showing them Harry Potter movies and not the movies that win those awards.