In the above mentioned OS .. I have used mostly all  ..
Flyme has the best Ram Management  .. Never faced lag while using flyme during multi tasking .

MIUI is good but has a poor RAM Management
So does EMUI ..
Samsung's Touchwiz haha everyone knows hows it xD ..

The best thing about flyme is it has only important and useful apps pre installed in system [Less bloatware] compared to other OS

Flyme is surely the best choice

Asus has too much bloatware but still its good

.

The only ones that has ever worked perfectly stock with no issues for me were Samsung, HTC and Sony and every others to me are about equal as they all have their share of issues and good stuff.

But anyway I dislike how oems such as Samsung/Sony and actually most of them handle their warranty and won't allow users to unlock the bootloader/root without fully voiding it. So custom as in from xda roms or manufacturer who offers close to stock with decent warranty are my first choices.

Glad to read this... What do you think about custom ROMs? Whats about CN?

Thanks for being frank. There are multiple reasons why OEMs don't allow bootloader. I can write a post about it...but one major reason is customers can get influensed & most of them who are not geeks will land up flashing a ROM which will harm Meizu devices. When they come to customer support..if the hardware is facing the issue...very diff to solve or fix it in the warranty.

Yeah guess it's the same as to why Apple is locking up their phones to avoid customers screwing up because they know nothing about it but get tricked by others to try anyway, so it makes sense and I understand the decision but the thing is some OEMs even void the hardware warranty (like samsung, shame on them for this one) when the bootloader has been unlocked which isn't related in any way, form or shape to the hardware... Good thing Meizu ain't playing dirty like this with the warranty and actually cover the hardware even if we're mess with the software part

Yes, thats like delighting our customers...we care & thus we want to do those things which matter a lot to customers.

Honestly I would choose pure Android :D. Pure Android has been lacking some important features and functionality back in the day of Gingerbread/Honeycomb but since Lollipop, practically all the things that I really need are already included in the pure Android, so I don't need any OEM. Most of the time it only causes longer waiting time for updates and bugs not related to the OS itself.

Which stock android was so perfect that taking it as it is & flashing into any devices would be so easy & hardware supported it well. :( We don't live in a perfect world..neither does google's android :)

Which stock android was so perfect that taking it as it is & flashing into any devices would be so easy & hardware supported it well. :( We don't live in a perfect world..neither does google's android :)

Edited by javak810i at 2016-05-27 17:41
Well, I'm not quite sure what you mean but I think it's up to every manufacturer to decide if they want to use pure Android or if they want to to build their own customized UI on top of it.

Sadly most of the brands choose not to use pure Android, because they wanna stand out and be different. At least there are the Nexus devices. Unfortunately I don't like much the new 6P and 5X hardware-wise so I decided not to buy them.
I still have my old Nexus 5 running on latest build of Android M and eventhough the HW is quite inferior (old Snapdragon 801), the UI is much faster and smoother. Even sometimes in apps it's more fluid (for example in Facebook app when you want to choose on of the new 6 reaction-emoticons, the popup is absolutely smooth on Nexus 5 but on my MX5 it has low FPS and stutters).

Also the notifications are miles better, tinted status bar works with every app, default apps and app links work as they should and the volume control is far superior. And last but not least, there are no issues with language transation missing or being incorrect