I just hate the small reflections when viewing a little darker stuff like movies, Games...
The extreme reflections outside will force even an AG owner to find a good position. And if all you do is reading pdfs glossy is okay. AG is soo much nicer though.
I lived with glossy for more than a year and didn't complain but AG is 1000 times better. In perfectly dark conditions you can only see the difference in color and contrast if you compare them next to each other. But with an AG you can stay in your hammock outside between two trees wearing anything and work comfortably. With glossy you need to wear a dark T-Shirt or have very dark skin to see anything at all. For a Caucasian that sucks (because we are usually to pale) and if you get it to work it will still be far from a nice experience.
Glossy in 5% of the time slightly better in direct comparison
AG in 95% of the time the better choice and often with a huge difference.
My aversion is primarily because of the small reflections that many people don't care about. I didn't either, but switching from glossy (and it was coated not as Glossy as Glass) to matte, is a, I never want to go back experience.
It is a difference like a really loud Notebook and than you switch to a perfectly silent one. More difference of course if you live somewhere like me where the only thing you can hear at night are crickets and their noise is muted easily by windows compared to car sounds in a city or the noise an AC can produce.