"weak personality" is correct and usable in written English.
It is used to describe someone who does not have a strong character or presence. For example, "John's weak personality caused him to succumb to peer pressure."
You will skip the system with your weak personality, so a person should supervise on you.
I even wondered whether I have a weak personality because I couldn't take the continuous barrage of requests.
"Medvedev has such a weak personality that he would be raped by lobbyists right on his table on the second day of his Presidency, and Putin knows this," Mikhail Delyagin, a former aide to Boris Yeltsin, remarked recently to the Moscow Times.
When it comes to making the case for understanding, mercy, pardon, Team Jesse clearly has a stronger case than Team Walt: At bottom, the younger man's sins and crimes are the sins and crimes of a weak personality rather than a strong one, and the strong always deserve more condemnation than the weak who end up in their thrall.
You have to be a weak personality to be a suicide bomber.
It's a carnival of irritating ignorance, a cult of (weak) personality ingraining itself in every part of political discourse with no signs of abating.
I don't have any patience with weak personalities".
"It attracts weak personalities, and I couldn't see myself playing politics on campus".
"People with weak personalities are seduced by the power, and they use the power to steal money from the people," Ahmed Ali, 46, a shop owner, said shortly after losing a game of chess.
But generally she greets life's dirty tricks with wry humour and a stoicism that has sustained her through the sort of professional trials and personal tribulations that have crippled – or killed – many a weaker personality.
A weaker personality would undoubtedly have been dulled and embittered by this prolonged period of disfavour, but for Pecci these years of retreat were extremely fertile.
