Punctuation mark personality? Yes, please! My favorite is the semicolon, so apparently this is me:
“Semi-colon (;): You’re well-read and urbane. You knew where this was on the keyboard before it became part of the winky emoticon. You’re more easy-going than Colon or Period types, but you’re still put together and usually organized. People are comfortable around you and tend to like you, though they may not be able to say exactly why.”
You could also read this as “you have a hard time committing to a real colon.” But I’ll stick with “well-read and urbane.”
Sadly, this list is missing some of the more unusual punctuation marks, but how often can you really use the interrobang, anyway?