6. International Travel
We've had planes in GTA games before (we assume they'll return to the series ahead of GTA 5), but we want it taken to the next level. GTA 5 is going to be massive so we want to be able to fly a plane from one country to another, or jump on a train or boat. By default you'd just be along for the ride as a passenger, but hi-jack the vehicle and go wherever you want. It'd take joyriding to a whole new level. We know a whole world to explore might be asking for too much, but how about part of Europe? You could even take the Eurostar from England to France.