Here's what we know:
* She embraced the darkness: Bonham Carter has openly discussed how much she enjoyed playing such a complex and dark character. She saw Bellatrix as a woman deeply affected by her family's history and twisted ideology, and she relished exploring those motivations.
* She enjoyed the physicality: Bonham Carter was known for her intense, physical performance as Bellatrix. She fully committed to the character's erratic behavior and wild movements, even enjoying the more grotesque aspects of the role, like her use of spells.
* She found it challenging: As much as she embraced the role, Bonham Carter has also spoken about how emotionally demanding playing Bellatrix was. She described the character as "a very unpleasant person" and admitted that it was tiring to portray such a deeply disturbed individual.
* She connected with Bellatrix's love for her family: While Bonham Carter certainly didn't condone Bellatrix's actions, she understood her fierce loyalty to her family, even if it was expressed in twisted ways. She has said that she related to that aspect of the character.
Ultimately, it's impossible to say definitively how Bonham Carter felt *after* playing Bellatrix, but it's clear that she was deeply engaged with the role and relished the challenge.
However, it's important to note that her personal experiences with the role have not been publicly disclosed in detail.