This is all hearsay since I've never been in a relationship, thus wouldn't really know what I wanted.
They're probably all petty, but here goes...
Not being intelligent.
Arrogance
Ignorance
Critical of the stupid things that make me happy. Obv they make me happy; stop pissing on my parade
Being too close too fast
Selfishness.
Being too serious. I'm only pretend serious.
Homophobia would not go over well.
Racism.
Overly religious.

Not wanting kids would kill me if it were a serious relationship. So would not believing in marriage. I'm old-fashioned in some senses and would want him to want those things too.

Yeah I did my civic duty this morning bright and early at 7am. Am I nerd because I fully planned my day around when I would be voting? What can I say I was excited.
I got there at 7:05 (it was in a church at the end of my block) and waited 45 minutes to mark my ballot. We were even on the news! Which was exciting, even though I didn't really wanna be interviewed.
The voting process was pretty easy, fill in the circle. It was kind of like taking a test.

Got my sticker and then rewarded myself with starbucks. Now I'm on pins and needles waiting for the results.

Whatever, crushes at work suck! Crushes suck in general. They just make you feel awkward and insane and never yield good results.
I told one of my friends that I had a crush on him and it didn't do anything but make things weird. It took years for us to talk to each other normally again.

I've never answered one of these, although I enjoy reading other people's answers. But this question was made for me.
Hands down, eeyore. I love eeyore. We sit in opposite corners of the elevator and 'oh dear' til we got rescued.