How do you personally do F' turns?

A good example of what Edward is saying is the F RUR'U' F' I use my thumb at the end. But for the R' F R F' I use my left index. Y perm I use my left index, T perm I use my thumb (but notice how the triggers are in the middle of those algs)

this, exactly.
 
A good example of what Edward is saying is the F RUR'U' F' I use my thumb at the end. But for the R' F R F' I use my left index. Y perm I use my left index, T perm I use my thumb (but notice how the triggers are in the middle of those algs)
Same!
 
i use my left index finger. it takes a while for me to re adjust which wastes alot of time.

Im trying to use thumbs.. but my other fingers tend to be.. stronger?
 
In the T-Perm and J-Perm and anything with an R' F I used my right index as I do the R' so I can hit the F and vice versa with an L and an F'.

Otherwise it is my Left Index.
 
Left index, the same way you would do a U'. I usually do a part-rotation (just tilting the cube up but not really rotating it) to bring the front face partway from being in the front to the top.
 
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