Yes, it's great to give your characters quirks, but don't go too far. Sometimes the quirks are so obvious and strange that it's clear the author's putting the quirk in for the sake of giving a character a quirk, and it's painful to read. Really.
I read this book once where the protagonist's shoes always squeaked. Always. It didn't matter what shoes he was wearing, or what floor he was walking across. They squeaked. Okay, hands up, who can make sense of that? Yes, it's mildly amusing. But it annoyed me, because it was ridiculous! It wasn't quirky. It was against the laws of physics, and I got annoyed, because the author had tried too hard to follow some good advice and it was obvious that's what he was doing.
Quirks can be great. Just don't defy the laws of physics for them.