Graduation
A good quality pen is one of the classic graduation gifts. After graduation, they're likely to be starting out on a professional career which will involve meetings, and taking a lot of notes. And as much as these computer things have taken over in many areas, there's still nothing better than a pen and paper for taking quick notes, and putting up less of a barrier in meetings. So if someone you know is about to graduate, give them the pen that will be in their hand as they make a start on their working life.
You might want to consider a personalised pen - get their name laser engraved, to make the gift a little bit more personal, and hopefully help to prevent their pen from disappearing!