Well to be honest, I fairly enjoyed the series. And actually I don't believe it will ever be bigger than Harry Potter. Mainly because it has been around longer. Apparently people love magic, and extreme fiction.
And yeah only 1 will survive, but it kinda shows us what we humans are kinda like inside. Are you personally willing to throw your life on the line for someone you love? Some people can't say they would.
I myself don't even know. I'll have to wait and see when the time comes. Mainly cuz I'll do whatever it takes for my loved ones including die...but I don't wanna die any kind of Saw movie way...or freeze to death (I hate cold)
Back to the point. Harry Potter and Hunger Games are both neat series although to see them end made me feel somewhat sad. But oh well, I own all the books and 2-4 of the Harry Potter movies