Now that I've got my Pandora I've started to sort my SD cards out, here's what I have so far, I've altered some of my designs to include the SD card size and logo too.
4GB - Pandora - just general games and new stuff goes on this card
4GB - Neo-Geo Collection - NEO-GEO/NGP/NGPC/NGCD
4GB - Sega Collection - SG-1001/3000 - MASTER SYSTEM/GAMEGEAR/MEGADRIVE/MEGA-CD/32-X
4GB - Nintendo Collection - NES/FDS/SNES/VIRTUAL BOY/GAMEBOY/COLOR/ADVANCE
4GB - Nintendo 64 Collection - most games on here, will be sorted down to best 100 games and put on Nintendo collection card
4GB - MAME Collection
8GB - ScummVM - most games bar childrens ones and feeble files (too big!) all cd audio/speech versions where available.
8GB - PS1 Collection - will get a 32GB card when cheap enough!
Hint though, it's probably better printing on normal or thin paper because i first printed on glossy labels that were obviously better but the paper was thicker and the card kept getting stuck in the card slot!
People please keep making new card designs, smaller cards are still cheaper than buying 16/32Gb ones, plus it keeps them organised better!