* Enthusiasm: This is the most direct and common way to make it an abstract noun.
* Eagerness: This captures a similar feeling of anticipation and excitement.
* Zeal: This implies a strong passion or fervor.
* Ardor: This suggests a passionate intensity.
* Vivacity: This emphasizes the lively and energetic nature of the feeling.
The best choice depends on the specific context and the nuance you want to convey.