I had a huge fondness for anything by Judy Blume and Beverly Cleary growing up and even still today but as far as other book series go, I would have to say I enjoyed a ton of the Babysitter's Club, Sweet Valley High Twins, Christopher Pike's, and R.L Stine's various book series.
I always loved series because I really enjoyed getting to know the characters well and liked having more time to spend with them. Whenever I read a stand alone book that I really fall in love with...there is always a sense of sadness that it ended too soon even if it had the most perfect of endings.
What are some of your favorite children's book series growing up? Do you have a preference for series vs stand alone's?
-Kids Book Junky