I can't speak a whole lot to iphones except a friend had an iPhone 5 cause she had to have it, but i had to put all the music and pics on it.. I am not a fan.
Since you have had android android, you know you can have widgets and you have a app drawer instead of all the apps being on a homescreen.
My choice is android and while a lot of people dont like the changes in the note5 its still looks to be a great phone.. My biggest concern is battery because i have been spoiled to all day batteries that the notes and motorola droids have provided for years.
It's really going to be up to you, there is harm in trying an iPhone and seeing if it is right for you. Me? No thanks, im either a note guy or a motorola droid guy.
As far as the note 5 vs the s6, if you dont mind the bigger screen the spen has a lot to offer. I wont buy a regular Galaxy because i like the note features.
And despite popular complaints, touchwiz has come a long way and is not the pain it used to be. If you don't care
About a bigger screen or spen, the s6 may be right for you.. I just like the notes better, and they have notable better battery life.
Good luck
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