Hello folks,
I ask for curiosity, if you don’t own a 6keyed flute, wich type of F key will you choose? Conal O’Grada and Seamus Egan have suggested to prefer the long one, what do you think?
All the best
I like to use the long F ascending and the short F descending. Going from Fnat to E, I “pop” my ring finger off the key to land smartly on the E hole.
Rob
I’m with Rob on this one, I use both of them. That is why I have a roller in my short F key.
If you have to choose? 
I use both keys a lot and would hate to choose. If really, really had to choose, I would go for the long one since the jump from D to F is quite common (I think) and is much easier to get by using the long F-key.
It’s not a choice I’d like to make, as I use both. However, I find the short F most handy–except for slurring D to F. However, I’ve seen players manage D to F using the short F key; it’s probably just a matter of putting in the time to minimize the ‘E blip’ in between.
“e blip”…is that some kind of internet thing? 
Having both is ideal (I do what Rob does, fwiw), but if I were to have only one I’d probably go with the short F. In fact, my antique flute baack with Jon C only had a short F because of shipping damage, and I got by fine with sticky tack plugging the long F hole.
Eric
I prefer the long F myself.