As always, it's a case of what you want and don't want to do. I certainly don't mind mint running amok normally. I even tried one year to grow numerous mints in a mint garden, I don't know what went wrong but many died off before they became established. Morrocan, chocolate, apple, pineapple, Swiss, peppermint and another type I can't remember. If you are going to have to put up with weeds in the garden, it could be worse than mint, at least it's useful and fragrant. Right now I have lemon balm spreading a bit - with help from me! A simple, attractive plant, not much attention needed, fragrant, useful leaves, easy to dig up a chunk and transplant and from my experience it's hardier than mint. Perennial, dying down over winter to miraculously regrow in spring to provide ground cover.