As far as bikes I've built up to completion as a C&V aficionado: 3 English, 2 American and one each French, Italian and Japanese. 5 of these builds were not for me, but for members of my family.

Of the frames I've collected, to build as future projects, there are: 6 English, 4 French, 2 American, and one each Italian and Swiss.

Of frames I've bought and then passed on because they didn't seem to have much potential: 1 each American and Japanese.

One of the English frames I built up (my first build) I loved to ride, but finally decided it was undersized, and passed it on; to someone known to you all who apparently thought enough of it to put it in his (extensive, one might say promiscuous) rotation, for awhile at least.

In terms of perfection of construction quality, one American and one Italian, neither yet built, stand out. They're both mid-80s, which degree of perfection I can appreciate, but find myself drawn inexorably to other bikes with:
More "imperfect" charms -- three English frames of '50s vintage, with honorable mention (not too far behind) for three '70s frames: English, French and Swiss. Somehow I seem to have skipped the '60s.

Overall, I voted English, in the poll as in real life; but I feel strongly that French bikes should not suffer the stigma they often do, on account of their threading -- the French were, I think particularly good at "production" bikes; and then there were the exalted "constructeurs". There are very nice Italian bikes, I am well aware, but by and large they don't seem to send me anywhere special, Classic Rendezvous (which it occurs to me may be slightly misnamed, culturallly) notwithstanding. The Japanese bike I built to completion was not of the very highest level of that type, but it was surprisingly nice when you got to know it. Still, Japanese being the poll leader was a complete surprise to me.