It would be awesome if you could configure the default paste mode for the clipboard manager. E.g. plain text paste on return key. Lots of clipboard manager apps function this way.
Then it would be cool if you could add a modifier to bring it back to the standard paste mode. E.g. shift+return for standard paste.
I would also love this feature! I was shocked that it doesn't already exist! And because the Clipboard Manager doesn't have traditional windowing, it would be very difficult to configure a conditional group with custom keyboard triggers!