We have a backyard that collects water from surrounding yards and slopes very gently down toward our slab foundation. The grass is constantly wet and we realize the need for French drains to help alleviate this issue. There is also a step down from our house into the backyard - something that always annoys me. My husband and I can not decide whether to install a patio of concrete pavers or a composite wood deck directly off the sliding door to the yard. Any ideas?