A mi antojo/ a su antojo

A mi antojo/ a su antojo
 

Hacer algo a su antojo, es hacer lo que a uno le place, is there an expression in English?

"as one pleases"
as I please
as he pleases

"as one wills"
as I will
as he wills

"at one's whim"
at my whim
at his whim

Yes, and additionally (from Oxford Bilingual) these examples are interesting,

tiene que hacerlo todo a su antojo = she has to do everything her own way;
maneja al marido a su antojo = she can twist her husband around her little finger