I think the answer to your question hinges around the choice of using the subjunctive or the indicative mood.
If you use, ‘como quieres’ you’re being specific and referring to exactly what you know the person wants but if you use the subjunctive it’s more along the lines of ‘whatever you wish, whatever that might be’.
If you’re thinking of ‘The Princess Bride’ perhaps the subjunctive and ‘como desees’ might be a good translation for ‘as you wish’ 😉