I think the biggest one is his consistency in turning former adversaries and hostiles into friends and allies.
Reiju
Zeff
Gin
Bon Clay
Duval
Kin'emon
Tashigi & G-5 Marines
Viola
Pudding
Germa 66
This is not coincidence.
Sanji wins people over consistently. In a way, his innate kindness and capacity for love is what conquers all obstacles.
Power of Love is a real thing in the world of One Piece.
I think it's Haki in its purest form and is the power that can truly transcend boundaries.
Sanji seems like he has the greatest potential in his specific respect, and given Gaban has CoC, I think it's only a matter of time Sanji will.
That chapter gonna hit the streets harder than crack in the 80s.
