In the Twisted Sisters Sock Workbook, it suggests that whenever you need to knit a swatch, you knit it in a sock-width tube. Then, if you like it, you can keep going and make it a sock.
The sheep, pigs & cattle don't care a bean if my socks match or even whether they are the same all the way up - so I did start knitting up oddments I'd spun into sock-width tubes, thinking that I would just make heels and toes as I had the right length, and not worry about the looks.
However, my spinning is only now really getting consistent, fine and good enough for what I spin to be likely to wear reasonably well, so I've reassigned those early tubes and they're about the place in slippers, gloves, etc.
I do like the idea of not knitting pairs, and choosing two individual socks to wear together... then when people laugh and point, and say, as they always do, "Ha ha, I bet you've got another pair like that at home!", I'll be able to smile sweetly and say, "Actually, no. All my socks are unique."