The classic bookworm is one who loves to read, admire and collect books, often amassing a large and specialised collection. Bookworms do not necessarily want to possess the books they love; an alternative would be to admire them in old libraries.

Bookworms generally place little value on music, after all, it's not allowed in most libraries, and wear normal clothes except maybe a t-shirt that says 'book power' or something of the sort. If there is a stereotypical bookworm personality, then they tend to be thought of as quiet dreamy types that get lost in the storyline of the book they are reading.

Image from Deviantart, info mostly by me.