Dirt magnet? Do you think?
It's for wearing on my finger 
I am trying to find something that I love, but I am REALLY fussy about comfort and can't bear anything that sticks out or catches, so I either need a plain metal band (like in the OP), or possibly an eternity ring, or one where the stone is set into the band, or the band comes up flush with the stone.
I don't really have any idea what I want, but I'll know it when I see it.
Budget about £300 but very happy to spend less, or more if it's perfect. Absolute max prob about £700, but I simply can't imagine there is a ring in the world I love enough to spend £700 on.