General question on tooling

[JScott]

Hey everybody, I have an easy question with a difficult answer. After you have all the basic tooling for a lathe and mill such as end mills, tool bits, boring bars, collets, mill vise, etc.  What is your most used or your favorite tooling item? Is it a knurling tool? Collet closer? Rotary table? 
I'm in the process of relocating my hobby shop and setting up to play around again. That is a long story which I'll relate later. I appreciate all your replies and recommendations!