Would you prefer having the newest posts showing as the default option?
If I may, I'd like to weigh in on this too...
No, at least not the way this forum currently handles it.
Seeing the "newest" post first just means scrolling back, or reading backwards, trying to find the last post you actually read... which also doesn't work because of the nested replies, like this one, which are not considered "newest" posts but are buried with the older post they are replies to.
These forums are clearly not built to support discussions. These are tech support, question-and-answer, forums.