I haven't used a PS3 Dual Shock or Six-axis.... but I did have some problems with the PS2 one.
-First, I don't like analogue face buttons, it always seemed to mean I had to press harder for things to work.
-The d-pad is too stiff
-The control sticks are too loose (not talking about wear as I never owbed one myself, just played a lot at my friends)
-The control sticks don't have directional aid (circular receptacles instead of octagon)
-One of them is in the wrong place... thumb stretching to get to the damn things.
-They don't have any proper grip on top, yes they are made of rubber but rubber doesn't work if your thumb is sweaty.
I don't have a problem with the shoulder buttons as some seem to do... but then I haven't played many FPS with it so that could be why.
Then again I can name problems for even my favourite old-style controller: The GameCube.
- The analogue triggers feel a bit odd... perhaps too loose.
- The same triggers don't have enough space behind them for my long fingers.... ie when I press them down to "clicked" position, the end of my finger is bent back slightly... which is fine in shooters and such, but when keeping a boost held for a long time on Burnout it gets uncomfy.
- The z-button is in an awkward place.
- D-pad too small.
