I watched the movie and the sequel because these are the favourite movies of some of my friends. I got interested enough to read the book.
Romance books isn't a genre in my comfort zone. I've very few experience with it, and don't seem to find books I truly find engaging in this genre. Doesn't mean I don't try it every once in a while.
I know that a lot of people like Bridget Jones and some went crazy over Mad About The Boy (Pun intended :P ).
For me, Bridget Jones's Diary wasn't really working for me. I guess the translation I read didn't help because it felt forced like it was trying to bring over the jokes from the English edition and utterly failing to do so.
Perhaps I didn't really like it because I'd already seen the movies, I'm not sure, but I didn't feel like reading the other books.
Note: I read a Dutch translation of this book