Clear information is critical in any game. For reasons that would take up at least a chapter in a book, a HUD or other information on-screen can hinder a game horribly; so much so that the player may literally not know what to do.
I remember my first ventures into RPGs...I couldn't get into them because the oddly-named items left me scratching my head as to what their purpose was. That's just one example (albeit, in a sub-menu rather than a HUD).
So I was wondering what games stand out to you with the most interesting, useful, creative, informative, and/or otherwise unique HUD system (or, if you like, menu system).
For me, it would be the Metroid Prime Trilogy. Not content with simply putting the player in the (GORGEOUS) Samus Aran's head, we got to see what life was like in her suit. The subtle motion delay of the visor information following along with Aran's turning of her head just added to that realism. The HUD wasn't forced - and you could adjust the opacity and motion delay settings, too - and presented easy-to-comprehend information on the fly. And that's not to mention the AMAZING menu system for accessing an Encyclopedia-worth of info on the story, creatures, and more. (Granted, I didn't totally care for MP2's whirly-wig node style, but it certainly was original. And while it wasn't bad, the map system never felt 100% what it ought to be.)
Now it's your turn! Aaaaand GO!