Introvert, extravert or ambivert?

I prefer one-on-one conversations to group activities.

I often prefer to express myself in writing.

I enjoy being alone.

I seem to care about wealth, fame, and status less than my peers.

People tell me that I'm a good listener.

I'm not a big risk-taker.

I enjoy work that allows me to "dive in" with few interruptions.

I like to celebrate birthdays on a small scale, with only one or two close friends or family members.