Details

I was recently reading something that made me want to pull my hair out one strand at a time.

For the love of all that is sacred to the binding gods I beseech everyone to please not put in details that don't matter. If they don't contribute to the depth of the heroine or the hero or the progression of the plot or their arc then leave it out.

I don't need to see her go to the bathroom unless her hero is the Tidibowl man.

This is just my personal opinion as a reader and I'm sure people would disagree. Sprinkling in a few quirky characteristics and mannerisms is a great way to enhance a character. Everyone does it. Or at least the authors with memorable characters do.