For me, it is TOS and it isn't even close. Comparing shows with 22-26 episodes a season to ones with only 10 is tricky. As is episodic vs serialized and live action vs animated. And 1 hour vs 30 minutes.
For me, I tend to think the serialized shows have less clunkers, but also less superior episodes. There is rarely closure after the episode. And a lot rides on the finales, which have mostly fallen kind of flat.
I tend to like live action & episodic better, and seasons with more episodes rather than less. And tend to give more points for excellent episodes rather than deducting for poor ones.
1. TOS. By a mile. There are easily 15 classics in there. No way a 10 episode season can compete with that. Don't think so? Give or take a couple based on personal preference. 1. City on the Edge of Forever, 2. Space Seed, 3. Arena, 4. Balance of Terror, 4.-5. The Menangerie Pt. 1 & 2, 6. A Taste of Armaggedon, 7. The Corbomite Manuever, 8. Where No Man Has Gone Before, 9. The Devil In The Dark , 10. Dagger of the Mind, 11. The Enemy Within, 12. Tomorrow Is Yesterday, 13. Shore Leave, 14. This Side of Paradise, 15. The Galileo Seven, 16. Errand of Mercy, 17. Mudd's Women, 18. The Return of the Archons, 19. The Naked Time.
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2. SNW
3. DISCO(So happy Trek was back, the fact that it was not great at first bothered me not one iota).
4. PROD
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5. PIC
6. LD
7. DS9
8. TNG (So happy Trek was back that it not being great at first did not bother me one iota).
9. VOY
10. ENT
11. TAS
