I have planted mint (black peppermint) at the top of a stepped part of the garden. I haven't told DH - whenever I mention mint, he rants about how it gets everywhere and can never be got rid of. Seriously, you'd think it was Japanese knotweed.
I'd quite like it to spread, we have a horrible weed that is halfway between bindweed and giant Lily pads. I'm hoping the mint will fight with this horrible thing or am I deluded?