Some people notice a difference between PC/XT and AT Model F switches, myself included. So you might want to have that as an option. My 122-Key Terminal F also feels a bit different than either my AT or XT.
The problem with these polls is that a lot of people haven't tried all the options, so don't have an opinion. It means lesser known options may get a much lower vote than if everyone had experience with all the options. If someone's never tried a Model F before, they're naturally going to vote for one of the Model M's. Given the availability of the M's over the F's, this will likely improperly skew the result towards the M's than if everyone tried the F's.
If a poll could be designed with different sections, that might help to give more information. Like this:
Favorite Buckling Spring:
* F
* M
* Haven't tried them both
* No opinion
Favorite F:
* PC/XT
* AT
* Terminal
* Never tried them/more than
* No opinion
Favorite M:
* IBM pre 1991
* IBM post 1991
* Maxiswitch
* Lexmark
* Unicomp
* Never tried them/more than one
* No opinion
Would the buckling spring's predecessor (beam springs) qualify to be in the poll? Likely not many have tried them, so I doubt much information can be gained. Perhaps just one question added to the poll:
Beam Springs:
* Prefer them over M and F
* Prefer M and F
* Never tried them
* No opinion
If people add a post to explain their vote, commenting on which boards they've tried and various qualifiers or details, it would be much more useful.