Funny - first time I heard of a microplane, I thought it might be a miniature version of a Cessna...
I´ve actually got two, but they´re used infrequently, I suppose.
I never trained as a chef - God Forbid, far too complicated for me - but I´ve done quite a few events over the last 20-odd years and, making chutneys, marmalades, etc., really taught me some knife skills. I use a chef´s knife for most tasks; garlic, ginger, slicing potatoes, carrots - gadgets I only use if I´ve got a really large amount of stuff to process.