I didn't really want to go back to Samsung ( I had the s2 and s3) but it does seem to be the best option for me.
Although I really will miss Motorola's active display.
Samsung's galaxy s series has changed a lot since the s2 and s3...
S7 is one of the best phones on the market right now. Touch wiz has improved a lot too. I was very impressed with last year's S6 and I was coming from a stock android experience.
it will be a bit tedious turning off the bloat ware but i think the more you use your new s7 the more you'll love it. The bloat ware is far less than the s3 days and at least one has the option to turn it off; there are stock apps on iOS I wish I could disable.