Features I like:
* Ability to set upper-bound on individual size
* Ability to ignore clipboard CF_ types
* Ability to retain variable amounts of data by time
* Ignore certain apps' clipboards
* Filterable history search
* Short and long content previews
I also use iTerm, but that's mainly for the performance benefits and customizability - I could live without it vs Terminal.app.
iTerm's great for the features it has that the regular terminal doesn't. Fullscreen borderless, universal hotkey to reveal, more configurations for workspaces, and I much prefer the paneling/tabs setup with iTerm too.
I assume the same argument is used for why Alfred is good, but I've never really gotten into it. Anyone mind trying to sell me?
What Spotlight makes up for by being the out-of-the-box default option, it lacks in versatility due to Apple's walled-garden policy.