That new string on a clean bearing feels...

Same could be said about fresh cotton on a wood axle. Both feel like:

The cool side of the pillow.
When time falls forward and you get an extra hour of sleep (or yoyo time) before work.
A long country drive when the leaves change colors.
A spring hike.

And I’ll steal:
Waking up to real snow (we don’t generally get these whee I live).
Finding $20 you didn’t know you had.
Fresh apple pie smell.