- Nature: Thomas had a deep appreciation for the natural world, and many of his poems are set in the countryside of Wales, where he grew up. He used nature as a source of inspiration and symbolism, and his poems often evoke a sense of wonder and awe at the beauty of the natural world.
- Childhood and Memory: Thomas's childhood experiences play a significant role in many of his poems. He often explored themes of nostalgia, loss, and the search for identity in his writing. His poems often contain vivid and detailed recollections of his childhood, and he used memory as a way to explore the complex relationship between the past and present.
- Death: Thomas was fascinated by the concept of death, and it is a recurring theme in many of his poems. He explored themes of mortality, grief, and the afterlife in his writing. His poems often convey a sense of urgency and a desire to live life to the fullest in the face of death.
- Love and Relationships: Thomas's poems often explore the complex dynamics of love and relationships. He wrote about the joys and challenges of love, the search for connection, and the pain of loss and separation. His poems often convey a sense of longing and desire, and he used love as a way to explore the human condition.
- Identity and Self-Expression: Thomas's poems often grapple with issues of identity and self-expression. He explored themes of authenticity, the search for meaning, and the tension between the individual and society. His poems often convey a sense of restlessness and a desire to break free from societal conventions in order to express one's true self.