User interface personalization enhances digital efficiency, usability, and accessibility. However, in user-driven setups, limited support for identifying and evaluating worthwhile opportunities often leads to underuse. We explore a reflexive personalization approach where individuals engage with their digital interaction data to identify meaningful personalization opportunities and benefits. We interviewed 12 participants, using experimental vignettes as design probes to support reflection on different forms of using interaction data to empower decision-making in personalization and the preferred level of system support. We found that people can independently identify personalization opportunities but prefer system support through visual personalization suggestions. Interaction data can shape how users perceive and approach personalization by reinforcing the perceived value of change and data collection, helping them weigh benefits against effort, and increasing the transparency of system suggestions. We discuss opportunities for designing personalization software that raises end-users' agency over interfaces through reflective engagement with their interaction data.

翻译：用户界面个性化提升了数字效率、可用性和可访问性。然而，在用户驱动的设置中，由于缺乏对有价值机会的识别和评估支持，往往导致个性化功能未被充分利用。本研究探索了一种反思性个性化方法，即用户通过与其数字交互数据的互动，来识别有意义的个性化机会与收益。我们访谈了12名参与者，采用实验性场景作为设计道具，支持用户反思不同形式的交互数据使用方式，以赋能个性化决策，并探讨其偏好的系统支持水平。研究发现：用户能独立发现个性化机会，但更偏好通过可视化个性化建议获得系统支持；交互数据可通过强化变更与数据收集的感知价值、帮助用户权衡收益与努力、以及提升系统建议的透明度，来塑造用户对个性化的认知与处理方式。我们讨论了设计个性化软件的机会——通过使用户反思性地参与其交互数据，提升其对界面的自主性。