What is your opinion, how should a proper RPG work developed with desktop as a target platform? My current prototype is:

Incase the picture attatchment doesn’t work use this Dropbox link:
http://dl.dropbox.com/u/128339680/Pictures/GUIDesign.png
EDIT: THE TEXTURES USED IN MY GUI ARE NOT MADE BY ME. They are made by"Ironbound Studios" and are avaible for free on the asset store. I am merely prototyping/speculating how the GUI should work/handle/feel, not how the coloration and graphic design should look.
Link to the pack if someone happen to want it: http://u3d.as/content/ironbound-studios/necromancer-gui/1Ax
Just to clear up potential confusion.
As you see it’s pretty compact and you will be able to navigate with the use of tabs, but won’t be able to open several windows at once, like, let’s say, WoW. As of now the game works like a 3rd person game, that means the mouse cursor will be locked and invisible, you open the “Character Window” (what i call the window that you see in the picture, i’m planning of doing things like trade windows in a separate window.) with keyboard-“E” (toggle behaviour) as of now, will also players set it for themselves.
Should i go with the “central hub” kind of thing i have going on right now, or a more “advanced” thingy that WoW has where you can have alot of windows open at the same time (This is useful for more experienced players, and i can see the usefullness of it, but i bet newer players might get confused by it.). Now, i won’t try to cater to the noobs, i want to harvest as much playability/controllability as i can out of desktop computers that things like consoles/smart phone based games lacks, but i guess i need to ask what kind of RPG GUI design you RPG fans out there prefer.
So:
- My prototype?
- WoW-esque?
- Skyrim-esque? (It covers the whole screen and from what i can remember you can’t see the main game from there)
- Other?
I’m not entirely sure what kind of game this should be, if it should be completely singleplayer, or have server based multiplayer, or even an MMO in the long run if i have the time/skill. If it is multiplayer you have to think about things like chat and such, you could get away with easier designs for a singleplayer game.
Also, what is your opinion on the size of the window, should windows be resizable, should they be draggable or locked (i have it draggable right now).
I am using the Necromancer GUI textures that i got for free from the Asset Store, btw.
Not sure if this sub-forum is appropriate or not, but i guess mods can move it to the appropriate forum if needed.