I started out with an HTC Inspire 4G , which went through several ROMs as I was a flashaholic . When it died and I had my sister's cracked T-Mo S3 , I hadn't yet rooted it before it died (Pixels leaked after a drop) . Then I got a Galaxy S4 from AT&T which was what I was supposed to be on as that's what my family plan is on . The phone was locked down tightly so I could only get root and not a bootloader unlock . I couldn't flash anything other than TouchWiz ROMs . That hurt . Then afterwards , the screen (not the glass) randomly shattered without a single drop . It remains unknown why , but then it was replaced by my current Galaxy S5 . I hadn't had enough time with my S4 to know that all of AT&T's phones except HTC and Nexus devices couldn't be bootloader unlocked/rooted . With my current S5 I once again have only root and super slow updates . I want my first Nexus because it's been nearly 3 years that I haven't had a purely stock Android experience (via custom ROMs) . I miss it so badly , as well as flashing ROMs . I'm a pretty heavy power user , I like to have my device as my device . And right now , as I'm stuck with this S5 , I just want to have Nexus . This is why I want the Nexus 5X .