I felt so good after revisiting a project and everything runs ok
Code readable
Managed to pick off where I left off and fixed some existing bugs
Added new features and uploaded the update

And then you woke up

It felt good just because to me it was a sign that I am actually improving in writing readable and maintainable code (backend that is)
Any1 can read the code and pick off the project
Also good documentation of the whole system
Which means I can easily get help if need be