It is great to be excited about something, to be enthusiastic, to be waiting for it, to prepare and make sure everyone gets the best out of the experience.
It is way less great when the attitude gets past excitement and shifts to eagerness. Eager as in sour, bitter, rough, forceful, pungent. It is when you do not leave others space. When you cut others short to make a point. When saying what you think to know is more important than letting others tell of their experience. When you make decisions without consulting, when you change the work without informing, when you demand agreement without explaining, when you take the spotlight without elevating.
Enthusiasm is contagious. But if you are eager instead, you will go alone.