nope... I'm not talking about a person... I'm talking about a system variable!
the below is from AutoCAD help files:
Initial value: 0
EXPERT - Controls whether certain prompts are issued.
0 Issues all prompts normally.
1 Suppresses “About to regen, proceed?” and “Really want to turn the current layer off?”
2 Suppresses the preceding prompts and “Block already defined. Redefine it?” (BLOCK) and “A drawing with this name already exists. Overwrite it?” (SAVE or WBLOCK).
3 Suppresses the preceding prompts and those issued by the LINETYPE command if you try to load a linetype that’s already loaded or create a new linetype in a file that already defines that linetype.
4 Suppresses the preceding prompts and those issued by UCS Save and VPORTS Save if the name you supply already exists.
5 Suppresses the prompt, “That name is already in Use, redefine it?” issued by the -DIMSTYLE Save option when you supply the name of an existing dimension style.
When a prompt is suppressed by EXPERT, the operation in question is performed as though you entered y at the prompt. Setting EXPERT can affect scripts, menu macros, AutoLISP, and the command functions.
Be sure to check out Lynn Allen's blog for some of the new features and improvements we can expect in 2007. She's got some screenshots and steps to follow. Also, it's not all about 3d, she mentions some other features as well (such as the improved x-ref palette, fields, tables, model/layout tabs, dynamic input, palette improvements, dwf underlay, printing to pdf, etc)