Know-How - how deep you go?

Hello my fellow Networkers.

How deep do you usually go when learning something new?

As for me, i cant go on without going all out full details - which is cool but so time consuming. and many other Engineers i got to know, dont have such a deep know-how as i have. Like mpls.. many know what it is, how it works but ever went deep like how ldp establish sessions? neighborships? what explicit null and implicit null labels are? and the other predefiend label nummbers?

im thinking sometimes, i do just to much.