I use 6 point sockets for everything I can, they are more sucure and less likely to round things off. Yet I still have a set of 12 point for use mostly on 12 point bolts under the valve covers on my Detroits, even some of the valve cover bolts are 12 point, starter bolts and a few others are also 12 point.

While 6 point sockets are my choice I only buy 12 point combination wrenches because for tight spots it gives you shorter swings before repositioning (exception of line wrencehs which are mostly 6 point for the better grip).

For square nuts and bolts I have 8 point sockets, not 12.

Any 12 point socket in 1/4" drive is a pretty small socket and those 12 points are going to be quite small, so a slightly damaged 6 point bolt or the socket and it's likely to round.
You'll be better off buying a set of 6 point 1/4" drive and saving the 12 points for 12 point stuff and/or the rare occasions when it's necessary to use them.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-