Focusing on the negative aspects of perfectionism:
* Sloppy: This emphasizes the lack of care and attention to detail.
* Careless: This emphasizes a lack of concern for accuracy or quality.
* Unorganized: This highlights the lack of structure and planning.
* Disorganized: Similar to unorganized, but emphasizes a lack of order and system.
Focusing on the positive aspects of a more relaxed attitude:
* Flexible: This emphasizes the ability to adapt and compromise.
* Easygoing: This highlights a relaxed and accepting attitude.
* Pragmatic: This emphasizes a focus on practical solutions and realistic expectations.
* Tolerant: This highlights an acceptance of flaws and imperfections.
Other options:
* Imperfectionist: This is a more direct opposite, but not as commonly used.
* Content: This emphasizes a sense of satisfaction with what is, even if it's not perfect.
Ultimately, the best opposite for "perfectionist" depends on the specific context and what you want to emphasize.