Most Helpful Girl
The inability to communicate is a huge turnoff. Sometimes guys turn into stone walls and you don't know what they're thinking/feeling. Then, they will suddenly do something out of the blue and it can be confusing and hurtful.
It's very frustrating. I say this because of my experience! I have dated a few 26/27 year old guys who I thought would be mature enough to have the communication thing down, but I was wrong. Arrogance would be a close second!