I personally enjoyed the first book the best, but the Catching Fire and Mockingjay were great as well! If you are planning to read this series, you need to start with book one or you will be very confused. And once you finish the first book you will most likely want to read the next two, just to know how it ends
The first one. I think they got worse as they went on. I hate when Boggs dies in the third book. MockingJay was a massacre of all the characters. Sort of a "Hurry-up-and-finish-the-series" kind of thing. I hope my books don't turn out like that. But I really did love the first book.