What is the best book series you ever read?

This is a real tough question for me and i imagine a lot of others. If i just choose trilogy I would say(hunger games or maze runner) keep in mind they are fresh in my gourd at the moment. If i say any kind of series I think i would go with(R A Salvatores dark elf books from forgotten realms or possibly Rick Riordens rangers apprentice series) Let me know how u weigh in on this