OK, this was more fun than freaky.
It thinks I'm male (I'm a girl).
It knows about my horrible novelty YouTube habit (tons of humor/comedy/tv comedy categories). #guilty
It thinks I have pets/cats. (Nope. but given how many novelty youtube vids probably involve cats, not crazy.)
And yeah, lots of finance/tech/business categories.
For now, I'm leaving them all in and not removing.
And sidebar to those who say this isn't everything Google knows about you. You're right. But this is just about ads.
The main Privacy Dashboard for account stuff is here: http://www.google.com/dashboard