I've been managing employees for over 15 years and in recent years, I've picked up a few great millennial employees. Here is a list of what I absolutely love to see:
1. Enthusiasm - I have one person who's first job out of college is working for me and her prior work experience is an internship with our company. She is awesome because no matter what I ask her to do, her response is always positive. I've asked her to go through inventory to find one item and her response is always "sure!". I love it. As a manager, I know that sometimes I'm asking someone to do something that's not fun or easy but it's just so nice to work with positive people who don't complain.
2. Quick to react - another response I love to hear is "I'm on it!", it makes me laugh every time. It might not be the way an older worker would respond but it's such an enthusiastic way to respond to a request. It's always followed by quick action to do whatever I've asked this person to do.
3. Excitement - I got this response from an intern recently, "yess!! I wanted to do this! cool". I quite nearly fell off my chair. As someone who has been in the industry for 15+ years, things lose their coolness factor, and it's just so refreshing to have someone with that energy level who's not intimidated by unknowns and new factors. I love it.
4. Questions - if you don't understand what I'm asking you to do, ask questions. Don't do it wrong just because you're afraid to ask questions.
5. Retain what you are taught - I had a girl at one point in my career who couldn't seem to retain important details. It gets exhausting to have to retrain, reteach and help someone who doesn't want to stop and figure things out for themselves. This may sound like I'm contradicting myself with point 4 so I guess I should clarify that I like new questions, not repeats of the same questions.