As I began blathering in this thread -
http://boards.straightdope.com/sdmb/showthread.php?threadid=103106
(Yeah, I know - I haven’t figured out how to link on the new board yet. Sue me for laziness.)
I began to talk about Buffy and roleplaying. I can only hope I’m not alone in putting so much thought into this, but I’m a geek.
I play D&D 3rd ed and Vampire: The Masquerade, and I think of the characters in Buffy in terms of these games quite a bit. I think that liberally spliceing together these two games, its quite possible to make a game of it and answer a lot of the questions people have about the character’s abilities and the general problems with the less-than-technical aspects of the Buffyverse.
Using these games, we can pretty much classify everything in Buffy and play out new scenarios at will. Not that anyone might want to, but I’m bored. 
As the main characters in the show go, there is a lot of discrepency in class and level, but that just goes with the problems with the way the show is written.
Giles: Has to be the leader in classes and maybe level. He likely has levels in Rogue or Bard and perhaps Wizard from his crazy college days. I view Watcher as a Prestige class, of which he would have to be near 8th level at least.
Buffy: Pretty self-explanitory. Fighter/Monk, though the Monk levels would lack a lot of the regular class skills outlined in the D&D Players Handbook. I think the best appication of the slayer stuff would work in a Template. The Slayer template would just add all the neat Slayer abilities - speed, strength and the occasionally-seen “Slayer Sense.”
Xander: Here is a bit of a problem, because the others have obviously advanced far beyond him for some reason. I can’t picture him as anything other than a low-level Fighter with maybe a level of Expert that gives all the skills he has in the construction biz.
Willow: Some might say Wizard, some might say Sorcerer, but looking at her constant need for material components and the spells she knows, I have to say she’s a high-level Adept.
The others don’'t really matter because they suck. 
Howerver, to get V:TM into it, we switch to the Vamps.
Vampire is already a template in D&D, but I think if we alter it a bit to include Generation, beginning with the Master as a Methusela (4th gen), we can easily create the stats for the his Childer and grandchilder.
If the Master was 4th gen, it would make Spike 8th, behind Druscilla (7th), Angel (6th) and Darla (5th), and you can see the power curve.
However, with the notable exception of Dracula, you don’t see any real Disciplines in use with any of the vampires.
The obviously physical ones are there: Fortitude, Cerelity (sp, I’m typing fast) and Potence.
For these, I can easily suggest each “point” in V:TM would equal +2 to the corresponding stat (Con, Initiative mods and Reflex saves, and Strength in order).
There are possibilities of Presence, and Druscilla obviously has some ability to affect minds, though at this very moment I’m at a loss for what discipline that might be under.
That’s the first installment. Let me know your thoughts and tell me I’m a lousy geek and I messed all the game stuff up.
Thanks!