Wow!
Great Work!!!
1. Should the font and size tags be separate tags as they are now, or should they be incorporated into one, looking something like this: [font style=Arial size=4] or like this [font:arial,3]
IMHO I think the separate tags will be easier for the user to understand.
3. Are the new tags (profile, post and PM) something that will be used?
I think those tags are Cool and will come in handy.
4. I've included the new look of the quote tag in this version, is this a good idea?
I like the new quote look.
5. The right and center tags could possibly be incorporated into one align-tag, what do you think about this?
Again, IMHO I think the separate tags are easier for the non-tekkie user to understand.