This is a bit of a strange one, but I just realised that I feel genuine pleasure or excitement when invoking certain commands - and am confident enough to know that I won't be alone in this.
The one which triggered the brain tingle just now is, simply
... which I think is pretty bound to how much I like Redis's clean feel, speed and nice API.
Ladies and gentlemen, don't leave a geek hanging. What's your secret CLI pleasure?