of course ripe would produce an overall better flavour, just due to the sugar content. but don't rule out green peppers for flavour. i don't eat green annumms, i have tried them and don't prefer them as they lack the heat content. last year i found some scotch bonnet peppers imported from mexico and of course there were some unripe pods included(green), my predujice was totally against green peppers(except green bell) and thought it a waste of money. but when i tasted the green version, i have to admit.... i really liked their heat and flavour combination. so it just goes to show, taste your peppers first and see if they are giving you the desired flavour.