Most Sony fans would describe the DualShock 3 as the pinnacle of all joypad design that cannot be equaled, some complain that it is too small and has a poor design compared to the 360 controller - in fact the Dualshock vs Xbox Controller has become yet another front upon which the console war is raging. To me, the DualShock is a familiar design that works equally well across all game genres as opposed to the 360's more shooter FPS based layout. But as with any design there is always room for improvement so here I take a look at some of the add-ons you can use to quickly modify your DualShock 3 according to your tastes.
Analog Stick Covers
Analog stick covers are simply rubber caps which you place over the top of your DualShock analog sticks, these are available in all manners of weird and wonderful patterns but all can be grouped under two main types. The first kind are simply to enhance the grip between your thumbs and the sticks thus allowing for more accurate aiming/movement, whereas the second kind try to completely change the feel of the stick by adding D-pad-like lines and recesses. I found the grip type to be surprisingly useful compared to the plasticy tops of the DualShock and they just felt comfortable. The D-pad type of cover felt very alien to use although I think a lot of this was due to the extra height that they put onto the sticks.
L2 & R2 Trigger Caps
The most frequent complaint against the DualShock 3 is when comparing its L2 & R2 shoulder buttons against the 360's triggers and to be honest I completely agree. The solution to this comes in the form of these clip-on triggers which don’t do much to improve the squashy feel of the buttons but do make them much easier to find during hectic multi-player firefights on Killzone 2, they also work quite well for more precise acceleration on driving games.
Rubber Pad Grip 
Okay, this thing is just weird and I feel is a solution to a problem that doesn't exist. Its purpose is clearly to provide extra grip but I’ve never emitted such copious amounts of slime from my palms that I haven’t been able to keep hold of a joy-pad while gaming. Now of course we all get a bit sweaty sometimes but this thing just compounds the problem by feeling sticky and dirty in a short space of time – not to mention that it looks like utter crap.
USB Keypad
This is probably more useful for someone who often frequents HOME or uses the PS3's text chatroom function a lot, but for your average gamer it's not got much to offer. It does pretty much what it says on the box and makes it easier to type although I found the buttons a little small it was still a lot easier and less tedious to use than the PS3's virtual keyboard.
So there you have it. You can find all of these items on Amazon pretty cheaply with stuff like the trigger and stick covers for only a couple of bucks. Out of all these things I tried my favorite is definitely the stick grips. They weren't too intrusive and it felt like they made a difference for my gaming accuracy.