I don't think it's a problem. In fact, when I found myself hung up something as inconsequential as indexing, I question my own rationality. That's why I called it brainwashing because c, c++, javascript, php, java, python,... most of the top 10 languages use 0-based indexing and most likely we would all be comfortable if they had all taken the path of being 1-based.

It's sort of like driving on the left or on the right. You just get used to one and you think it's the right side :).