Thanks for your input.
I have no problem with the UI of stock google/AOSP. But I'm sorry but samsung need to work on the aesthetic design and making it easier to use. I played around with every feature on my note 2, and I can say maybe used a couple features. I spent days and days customizing widgets and launchers, flashing different ROMs, just trying to get it how i wanted it and in the end I was never really happy with how it looked (some ROM's wiped touchwiz completely, but you would lose some actually decent apps like the TW camera app).
Multi-window
At first I thought the multi-window was a very cool feature, but I honestly never used it as much as I thought I would. I eventually gave the note 2 to my wife and she enjoyed it mainly for the battery life and screen size; but she never once used the multi-window feature even after I numerously told her how to use it.
I bought note 2 mainly for multi window, but I rarely used it because 2 reasons :
1. I often forgot it exists
2. It was not intuitive. Long press back button to show the toggle, press the toggle, then drag the app. The toggle button was also distracting
But after a while I use it more often and the interface is continuously improved. Resizeable, minimize window, 4 windows (for tablet). Now I only need to swipe from the edge to toggle the app selection. Multi windows in present condition is very very useful.
for example, sometimes when I was browsing I found Images which contains some useful data which I need to convert to notes. I simply swipe from the right edge, drag evernote to 2nd window, then type the data . When I need to calculate anything, I use the calculator in 3rd window. If I need to compare the image to other images, I simply open Gallery or other browser in 4th window.
Without multi windows, it will take more times & efforts. Browse in Chrome, found the image, switch to evernote, type little bit of data, switch to chrome again to see image, then switch to evernote again, etc
Add S pen to that and the productivity value (at least for me) is very high.
Yes, Samsung phones sometimes lag (in my experience). But it is minor thing for me compared to the productivity value.
It's like condom. I'd rather have it but not need it, than need it but not have it