My preferences are game dependent.
For games that require wide sweeping movements of the joystick I prefer Wicos to anything else.
(Especially those where you don't want to feel the corners of the stick).
For games that require precise movements in given directions, or require you to switch directions 180 degrees alot, I prefer my T-stiks.
The throw is shorter, and you can feel the corners on them, so you KNOW you are hitting a diagonal.