I love the XBox 360 controller, except for the terrible d-pad, although I found on the red controller the D-pad was a bit better. However, the 360 controller bothers my carpal tunnel strained wrists the least out of the 3 controllers available for this generation's consoles. Sony's isn't too bad, but I prefer the sticks to be staggered, rather then next to each other and the current Nintendo Classic Controller is just .. ouch .. after a short while.
I miss the Logitech wirless controllers from last generation.. those things were so damn nice, no matter which system you bought it for (PS2 or 360).