Rockstar is just making the wait unbearable. They've just released another GTA trailer which isn't just one trailer, it's three trailers in one!
There will be three main characters in GTA 5 which you'll be able to switch between in-game. Their lifestyles and personality are completely different and they live in different parts of the map. The aim of this is to experience three different stories and at the same time make full use of the entire map.
When watching the trailers, make sure to have annotations enabled.