Good post man, unlike a lot of people here I don't want to make you feel bad for going with something different (and there are a lot of 6 owners trying to make 6+ owners feel bad, and vice versa).
I think a lot of the iPhone users on here are finally getting a taste of the medicine they were dishing out to those of us who are mac fans but happen to have android phones, lol.
Back to the S-Pen, it's a really cool feature that I fell in love with when I first got my note 2. I was really looking forward to it, and then as time went on I rarely used it because the screen felt too small lol.
On my Surface Pro, I use the pen - and even there it feels a tad small. a 15" tablet would be a wonderful thing, but yeah whatever.
I hope you find joy in using your Note 4!