An excellent logo typically possesses the following six characteristics: 1. Clarity - The logo should be easily recognizable and understood. 2. Simplicity - Simplicity is key; a logo should be simple enough to be remembered. 3. Versatility - It should be effective across various mediums and sizes. 4. Originality - The design should be unique and distinguishable from others. 5. Timelessness - A great logo should not be trendy and should remain relevant over time. 6. Memorable - It should be memorable enough to leave a lasting impression.