I didn't really want any of them. They were free, so what the heck.
the 1GB is the only one i use. The others just set around watching the data being moved around waiting to be put in the game.
a 1 gb and a 2 gb stick. i had the 1 gb for over a year for my camera, and i bought the 2 gb disk a couple of months ago for the wii and other backup. yet to use it though.
I have 2 1GB Sandisk Cruzers, a 4GB OCZ SDHC card and 4GB Sandisk Extreme SDHC for my video camera, a 2GB SD card that came with the camera, and a 4GB Sandisk Ultimate CF to use with my mom's SLR. There's also some really old 32MB or 64MB cards I had that were for my old camera.
Sorry, by memory stick I thought you were talking the USB kind. As for Memory cards, just the 3, 2GB for my dSLR, 2GB for compact camera and 1GB for the Wii.
Well I have a 32MB MMC in my 6230, another one in my broken 6600, a 1GB memory stick duo in my PSP and I used to have a 256MB one but I gave it to my brother for his new PSP slim and lite.