Luisa is the forum favourite?

Really?
Personally I've only seen one person refer to Luisa as Queen (and I can assure you it wasn't me!) but perhaps the OP has seen many more?
If I'm honest I find it more interesting to see the reaction from people when they see it
Each to their own of course but personally I don't really see it as any big deal- people have all sorts of names for celebs etc on these forums and they don't bother me either. Yeah the King or Queen thing isn't really my thing also but it certainly doesn't bother me in the slightest.
I do find it interesting just how many people seem to hate it so much or those who denigrate others by saying they must be schoolchildren or imply they lack brain-cells etc if they dare to do it. For me that's a little worse.