I would like that you invented a brick like this:
but the size 1x1
-Thank you, Melonkernel
The thought crossed my mind three weeks ago. I tried to think of why they wouldn't do it, and I was hard pressed to find a reason not to... Sometimes there are parts that tread dangerously into the 'hard to remove' once you lay them down category, but this is hardly such an item.
Though it's probably less popular, one piece I was thinking of was a 1x1x something with a vertical axle or technic pin hole so there's no stud on top.
There's definitely some interest in a double sided 'female' brick.. perhaps a 1x1x2/3 tall one and a 2x2x2/3 version.