Let's take this topic from the unreading pit!
About Doom: I think SNES version is not the best port choice because of low fps and bad graphics. In my opinion, if we take all aspects, the best console port choice is PSX.
Saturn is also good: its medium fps is compensated with increased rapid-firing which so helpful in 100% runs. I don't know what objective is the best in Doom runs and what chance to take a rejection because of the bad port choice (answer if the chance is high!), but I think it should be any% for every port (32X is small and 100% will be also interesting to watch). The difficulty should be UV for SNES and 32X because of the monsters's aggression and Nightmare for PSX and 32X (only for 100%). Is it correct?
P.S: Bizhawk is not enough fixed to emulate Saturn's Doom. Reason is here:
http://tasvideos.org/forum/viewtopic.php?t=15183
With Wolfenstein everything is better! I think any port will be interresting, but the best is DOS of course, with no SNES's rocket launcher :-) The objective is better any% because almost all floors are maze-like and it's difficult to get the best route for 100%!