iPhone Wallpaper Comparison

I've decided to design and giveaway an iPhone Wallpaper collection entitled 'Video Game Greats' via a treasure hunt and my blog. Taking inspiration from a poster on Forrst and his Zelda wallpaper, I wanted to create a set of wallpapers that would be simple, and recognisable via a single icon or symbol. However, I'm stuck on whether that icon should be in actual icon form, the Mario wallpaper, or letterpress form, the Sonic wallpaper. Any comments would be highly appreciated, and feel free to leave as detailed feedback as possible.