For me, I normally choose a picture online. I'm not very good at drawing so :'). The appearance of my character would depend on what I'd be roleplaying and what my character's personality would be.
I usually get upset when people aren't willing to prepare for a roleplay. To me, it's really important to know about the other person's characters or their preferences. If they dive straight in without letting me know about anything, I sorta get uninterested. But, others may not feel the same...