I don't really like y/n. It's like they have two personalities and only two personalities. Either OP and cooky or too shy to even look you in the eye. Plus, writing y/n over and over again gets annoying. Computer or phone. 

OCs are better, in my opinion. They have a name, a more developed personality, and have developed in the story they're in. Y/n just stays the stay. The only that's changed about them is their relationship status. Sorry if you do like or love y/n, but I haven't found that many stories with a decent, realistic y/n.