How often do you use 3/8” drive?

I’m a student working in building my toolbox. I’m debating how much I want to invest on a 3/8” drive socket set. I’m planning to go into corporate aviation if that makes any difference. From what I’ve been told, 90% of what you’ll use is 1/4” drive.

Also, 6 point or 12 point? I bought all my 1/4” stuff in 12 point but I’m thinking 6 point would be better for 3/8” drive because of the higher torque.

Thanks for your input.

Edit: thanks for all the responses and advice guys. Don’t have the time to respond to all the comments but I read them all.