I used to beat the hell out of some craftsman sockets with air impact and finally cracked one after years of spinning lug nuts with it. Buy once, cry once definitely applies when talking tools.

As for which ones, thats up to the man working the business end of it. I've got 1/4, 3/8 and 1/2 drive. elbows, adapters, extensions, blah blah blah. why? i don't really know..... just what I've accumulated of the years.

My torque wrenches are 1/2. But its nice to grab a 1/2" inch socket in 1/4 drive for stuff like battery cable terminal clamps.

My most favorite socket adapter you ask?? the 3/8" drive adapter that goes on my drill! love that thing, break 'em loose and spin 'em off!