i personally think Anakin is the perfect master for her they really compliment each other well. They are so alike in so many ways and work well together. But i think she would have done okay with obiwan as her master too but i think anakin is a better fit for her
Ahsoka is fine with Anakin as her Master. He's a little আরো flexible with the rules and that helps them in the battles they have fought in the Clone Wars so far. Obi-Wan would've done a good job with her too but I think because she's like Anakin they would knock heads constantly.