Rebecca O’Tierney is a unique and multifaceted individual, whose life is significantly shaped by both her physical attributes and her personal qualities. Here’s a detailed commentary on her character and circumstances:

1. Personality and Traits:
- Disciplined and Meticulous: Rebecca’s commitment to routine medical checkups and fitness assessments shows her careful and proactive approach to maintaining her health.
- Punctual and Hardworking: Her success as a research fellow at a young age reflects her dedication and industriousness.
- Persistent and Assertive: These traits would have helped her navigate the challenges posed by her unusual physique and skeptical professional circles.
- Curious and Sociable: Engaging in the selection and development of exotic berry crops indicates an adventurous mind, not content with the conventional.
- Confident and Comfortable: Her self-respect and comfort in her own skin, despite societal pressures, demonstrate a strong sense of self.

2. Physical Attributes:
- Striking Beauty: Rebecca’s description paints a picture of an extraordinarily beautiful woman with distinctive features like thick copper hair and green eyes, contributing to her allure.
- Voluptuous Body: Her extremely voluptuous figure, particularly her enormous breasts and wide hips, has a considerable impact on her daily life. Such a body shape emphasizes her femininity but also poses numerous practical challenges.

3. Living Adaptations:
- Custom Solutions: From adjustable TV stands to custom orthopedic chairs and supportive underwear, Rebecca has extensively modified her living and working environments to accommodate her body. This adaptability showcases her problem-solving skills and determination to live comfortably.
- Fitness and Health: Rebecca’s dedication to training, such as back exercises, gluteal muscle workouts, and swimming, underpins her commitment to health and wellness. Her use of body pillows, anti-fatigue mats, and anti-chafing products signifies a thorough approach to managing physical discomfort.

4. Social and Professional Challenges:
- Unwanted Attention and Professional Overlooking: She faces the dual struggle of being sexualized by society yet not taken seriously in her professional domain. This dichotomy would be frustrating and possibly alienating.
- Need for Recognition: Rebecca desires a balance where her sexuality is acknowledged without overshadowing her professional and personal achievements. She respects her own sexuality but dislikes being reduced to it.

5. Sexuality and Social Pressures:
- Embracing Sexuality: Unlike many who might find overt sexual attention distressing, Rebecca finds empowerment in her sexual appeal. Her desire for her sexuality to be praised respectfully, without it undermining her intellectual and professional capabilities, speaks volumes about her self-assurance.
- Rejection of Desexualization: Her irritation with the term “sexualization” and the societal push towards desexualization reveals a conflict with modern feminist perspectives. Rebecca values her sexual identity and finds the pressure to desexualize patronizing and diminishing.

6. Interpersonal Preferences:
- Selective Praise: Compliments that acknowledge her femininity without reducing her to mere sexual objectification resonate with her. Terms that infantilize or sexualize her disregarding her core self are strongly repugnant.

Conclusion: Rebecca O’Tierney is a complex individual with a harmonious blend of intellectual prowess, physical beauty, and deep-seated self-respect. She has skillfully adapted her environment to overcome the physical limitations posed by her body, and she thrives professionally while managing the social challenges related to her appearance. Rebecca’s journey is about balancing her evident sexuality with her intellectual and professional identity, seeking a world that values her for the entire spectrum of her qualities. Her story is a testament to resilience, adaptability, and the assertion of self-worth against societal expectations.