I have strong feelings that other that standard text colors and font sizes should be used very sparingly.
I don't think the non-admin mode (minnemooseus) ever uses larger than the standard "2" text size.
On those rare occasions that the admin-mode (Adminnemooseus) uses larger than the standard "2" text size, it means that I'm getting significantly pissed about something, and drastic admin actions might be coming if things don't get better.
I have edited member messages, for excessive font size.
Cheers,
Adminnemooseus