An old meme for old times' sake

[40cakes]

I love looking at people's icons, but I don't always *get* them - I often wonder stuff like, "Who's that guy?" or "Where's that quote from?" but I tend not to ask, for various reasons. So come on, here are my icons. Pick one (or more!) you're curious about, and I'll try to explain it. Or at least explain what I like about it.