I think F2P deserves a single monster that is at least decent training and provides some rune and OSRS gold addy drops every now and then, with no possibility of experiencing a rev abruptly appear and possibly own you.
Remeber that feeling of pride you got when you completed dragon slayer? How did you access Crandor? By boat of course! How can you visit Pest Control to conserve the Void Knight? Boat! How can you visit Brimenhaven Dungeon to have some metallic dragons? Boat of course!
Boats are used frequently in RuneScape. You constantly have some NPC sail you to some island. But why can't YOU bring yourself and not have to pay that small amount of $ that occupies inventory space. Well with the new Boating Skill you can. This is how it works. It goes something like construction, but you operate at Port Sarim, Port Phasmatys, Port Khazzard etc.. You would buy planks like in Building and you'd work on your ship. You would need a saw to cut the boards, Nails, Planks (Of different types like building ) hammer and of course .
Then once you built all the sections of your ship it is possible to add things such as a flag or have the symbol of a clan on it. Then you can employ a crew. You can employ a navagator, chef, pirate etc. to help take care of your ship. You might also put cannons or catapults in your ship to battle other enemy boats. This would be part of a mini-game.
Then you can sail your ships into different islands, however, you'd have more direct control over your boat. To sail your boat you need to have a navigator along with a priest to help show you how you can maneuver and run the ship. As soon as you get into a certain level you will not require a Captain or Navigator. You can have different rooms like cottages, a kitchen (That's where the Chef comes in), and Cheap RS gold even a war-room in which you co-ordinate battles (Part of that mini-game see below). Well on to the Mini-Game...