doubtful
Pessimist
Paranoid, maybe?
Affable means likeable and friendly. An example of affable used in a sentence is: His affable nature drew people to him and he was always surrounded by friends and loved ones.
Always right
A critic
A faultfinder or a critic.
The word "scapegoat" is sometimes used in that sense.
Self-opinionated
Noisy.
kiss me
Inquisitive