I know a idea like this has been mentioned millions of times, but heres my view of the idea: Shipworking - a new skill, mostly used for keeping, making, repairing ships. When you make/buy u can go to a dock and start sailing in the sea. The ships move just the same way as you walk (where you click, there you go). In the sea there are new/small islands, on witch are quests, cities, mosters. The only way how to get on theese islands, is to travel by ship. The sea is like the wildy, ewryone can attack ewryone, only the attacking happens like a abordage. Both ships (only two ships can battle at one time) come together and put planks on the other ships. now all people from the both ships can battle in mele. How do u like this simple idea?