So I never had an Android, but the 4s was the first Apple product I owned. I have to admit that the learning curve was rough at first. Things that had seemed so easy on my other phones, like placing photos into a folder, or downloading ringtones, etc, had become much more of a process. Having to run everything through iTunes was annoying.
I have now been an Apple man for 2 years and I love it. I love how iTunes takes care of all my needs regarding photos, videos, conversions, and, obviously, music. Everything in the same place! Apps open UBER fast, scrolling through anything (apps, music, lists, etc) is super seemless. Upgrading to a new phone (from the 4s to the 6) was insanely easy. I could go on, but once I got used to it, I have never for a second wished I had a different phone. My 2 iPhones were the best pieces of technology I ever bought.
I hope you get the same enjoyment out of it that I do.