When my fingernails start clicking on my laptop keyboard, I cut them. I can't stand long nails at all. I'm headed for a career in health care, and I think shorter are more sanitary (and pose less of a risk of poking holes in gloves).
I used to work in the same office with someone whose (gel) nails were so long they curved. I remember her using them like chopsticks to eat food. Most disgusting thing I have ever witnessed.