I'm going to post twice in one day, now that I'm playing like De Niro. Here goes my second post for the day:

Young Vito Corleone (10)
Mary Corleone (10)
Don Vito Corleone (15)
Michael Corleone (13)
Santino 'Sonny' Corleone (12)
Pete Clemenza (13)
Tom Hagen (17)
Capt. McCluskey (14)
Jack Woltz (8)
Emilio Barzini (9)
Virgil 'The Turk' Sollozzo (9)
Kay Adams (6)
Salvatore "Sally" Tessio (13)
Connie Corleone Rizzi (8)
Carlo Rizzi (7)
Fredo Corleone (8)
Carmine Cuneo (12)
Johnny Fontane (9)
Twin Bodyguard Francesco (10)
Twin Bodyguard Armand (10)
Mama Corleone (12)
Luca Brasi (14)
Paulie Gatto (4)
Enzo The Baker (11)
Lotsalasagna (10)
Amerigo Bonasera (11)
Al Neri (11)
Moe Green
Cardinal Lamberto (10)
Bruno Tattaglia (6)
Theresa Hagen (7)
Philip Tattaglia (10)
Lucy Mancini (9)
Sandra Corleone (8)
Mrs. Clemenza (12)
Joey Zasa (11)
De Niro (-1)
Apollonia Vitelli-Corleone (12)
Fabrizio (6)
Don Tommasino (15)
Don Altobello (10)
Night Nurse (14)

+1 Night Nurse / -1 De Niro

P.S. I've added a new rule. Now you can give people negative numbers.