I was wondering if I could vote for my pizza ?
There is no rule about voting for your own pizza in the OP, but the same question as yours was asked in the past year and according to icopress's reply, it was allowed. So, are we voting for our own pizza?
This is allowed, but if I were you I wouldn't do it. 
It's probably still allowed to vote for your own pizza but like icopress, I wouldn't do that.