I'm a bit obsessed with the look and cleanliness of my nails. I hate it when my nails grow to different lengths and sometimes when they get long they painfully break. So when they get long and ragged I clip them. I'm glad I never developed the habit of biting my nails.
Of course, when I was a little girl my mom would usually clip my finger and toenails after I had a bath, and I hated it, especially my toenails, and a struggle would ensue. And she'd cut my fingernails so short that trying to peel an orange afterwards was unpleasant.