DDO is different.
DDO has actual trap disabling. Nothing is as satisfying as the "click" sound of an disabled trap !
DDO has Adventure.
DDO has a story - even though it develops itself only inside of your mind because you have to pice together all of these story parts by yourself.
DDO has a non-war , non-factions setting.
DDO has a Fantasy setting with Pirates !
DDO has living constructs.