Reflecting on my motivations for being a member of the Rio de Janeiro Exploratory Practice Group since 2016, I felt compelled to understand what would be the reasons for three other colleagues to have been part of this group for almost three decades and continue to be very engaged in the group activities. From their discourse, I seek to understand what sustainability means for them in this movement of working to understand. To analyze the data, an interdisciplinary framework was utilized. The following theoretical components were: Exploratory Practice (MILLER ET AL., 2008; ALLWRIGHT AND HANKS, 2009), which deals with reflection, teaching-learning, teacher-learner training, doing research; narrative and evaluation studies (LABOV; WALETZKY, 1967; LABOV, 1972; LINDE, 1993, 1997; MOITA LOPES, 2001; BASTOS, 2004, 2005), which are of great importance for this research, in order to analyze narratives of professional experiences and participants lives; some concepts which enable me to interpret in the collaborators speeches a relationship of affect in relation to the Exploratory Practice group and to the relationship built (REZENDE, COELHO, 2010; ALBA-JUEZ MACKENZIE, 2019; LE BRETON, 2021); Appraisal Theory (MARTIN and WHITE, 2005; ALMEIDA, 2010; VIAN JR, 2009; 2010) helps me to map the evaluative marks in the exploratory conversations between the participants and me. This research adopts a qualitative-interpretivist approach (DENZIN; LINCOLN, 2006) to the investigation of the Practitioner Research paradigm (COCHRAN-SMITH; LYTLE, 2009). As the research was developed by members of the group, this study is also considered as autoethnographic (BOCHNER, ELLIS, JONES, 2016) and the understandings were constructed collaboratively. Data were collaboratively generated in exploratory conversations (MILLER, 2001), recorded and transcribed according to conventions based on Conversation Analysis (BASTOS, BIAR, 2015). I understand that the participants perceptions regarding the events narrated during our conversations are social and cultural constructions that were formed throughout their experiences and led them to join the group. Our emotions and beliefs brought us to the Exploratory Practice group and brought us together as a community of practice (WENGER, 2007). Some emerging understandings suggest that collaborators have unique perceptions regarding their motivations for participating in the group and their working to understand that is associated with care-love that we maintain in our relationships in the community. Each practitioner understands sustainability from the perspective of a different principle of Exploratory Practice, generating the possibility of proposing the concept of sustainabilities in the plural.