Favorite episodes of the Original Series

There doesn't seem to be too much traffic these days, and I know it has been done to death, but I am wondering what some of your favorite episodes from the Original Series were? My tastes are a little unique compared to popular tastes. I am not really a fan of City on the Edge of Forever, nor am I a fan of Balance of Terror. In no particular order:

All Our Yesterdays
The Galileo Seven
Amok Time
Patterns of Force
The Tholian Web
The Trouble with Tribbles
Journey to Babel
Arena
The Squire of Gothos

What are some of yours?

First seven off the top of my head...

- Doomsday Machine: starship phasers vs Galactus-type menace; also William Windom.
- The Menagerie: I love seeing their earliest ideas; phaser cannon scene.
- A Piece of the Action: "Hey a, Scotty, dis is Koik." Just great camp.
- Devil in the Dark: the first Trek episode I ever saw; great story twist.
- Errand of Mercy: great story twist and cool ending (great music)
- Squire of Gothos: also great story twist
- Miri: "No more blah blah blah!" 'Nuff said.

More...

- The Changeling: love the triple-wham reveal to Nomad at the end; "Steh-rill-izze..."
- The Corbomite Maneuver: one huge a$$ ship + tranya; also some great musical scores.
- The Immunity Syndrome: a supergiant cell, perhaps part of a much larger organism? Wtf?
- The Ultimate Computer: starship battles; William Marshall.

PS, sorry for the double post, but the episodes just kept comin'.

I forgot about the Menagerie. It is also one of my favorites. I also like Court Martial and the Naked Time.

I concur.

Spock's Brain

Space Seed
Balance of Terror
Where No Man Has Gone Before
Doomsday Machine
City On The Edge of Forever