I like using screen protectors - especially glass ones - for several reasons.
1.Protects my screen against accidental damages. I usually never drop my phone. However, after having a toddler in my life, it's a must. She once kicked my belt holster case & opened it, leading to my phone dropping on the hard floor. The glass protector cracked but not my phone screen. Screen protector saved the day.
2. Due to the work I do, my right thumb's underside is very rough. It has scratched phone screens before. The film protectors don't stand a chance of lasting even one week. So I use glass screen protectors.
3. It's good for resale value having a flawless screen. The buyer feels more assured & confidant.
4. I can dress up my phone by changing colors. See pic below for example.
[url]http://img.photobucket.com/albums/v228/optimummind/Mobile%20Uploads/IMG_20160227_141258.jpg[/URL]