The order went in for 15 inch deep upper cabinets and 24 inch deep lower cabinets. It's a fairly small kitchen, and I'm wondering if the 15 inch deep cabinets will make the kitchen feel too closed in. Is it worth it for the extra space inside? And if we go for the 15 inch upper cabinets, should there still be 18 inches between cabinets and counter? Or should we increase that an inch or two to open up the room??