So I don't have to keep telling it what font to type in, and stuff ;)

+1
Prefered font face, style and size should be additional "board settings", like RTE enabled or not.
I requested it in this post

I'm also for having a default post style.

I know this would be a nice feature - but I do hate it when I read a flow of things, and different users have different fonts as default, its fine for using different fonts within a post, but when you read a topic which has some posts in very different fonts its a pain.

For me to read .John's post (and signature) I have to increase the text size on firefox to see.

Yeah that's true, it could get annoying. Most of John's posts I don't read but rather skip as I have to squint to see it. Having a huge resolution really doesn't help.

I guess as long as it had a disable button in the ACP :P