Today I received my second iPhone SE and I will return it for the same reason I returned the first one:
The display (compared to my iPhone 5) is -sorry Apple- crap. By crap I mean it handles color changes of high contrast very badly. It's very notable if I'm scrolling through black text on white background like the iPhone welcome screen when choosing the language, Instapaper, Tweetbot, Safari or Mail. The former black pixels get violet before becoming white. The actual black-to-white (or inverse) color change is a noticeable black-to-violet-to-white (or inverse) color change. While scrolling large parts of the display have a violet hue instead of looking white. As soon as the movement stops everything looks fine.
Since reading/scrolling in Mail, Instapaper, Tweetbot and Safari is 80% of my iPhone usage it's very annoying. I've never seen this behavior on any iPhone or iPad before (except the first iPhone SE of course). It's also easily noticeable in the settings App.
Interesting. I have some questions for you:
1) How many times a day do you select a language in the Welcome Screen?
2) When using your Instapaper, Tweetbit, Safari, or Mail apps, have you considered looking at the content contained in the apps rather than focusing on how the info is presented to you?
3) Have you considered cognitive behavioral therapy for your OCD?