1. Customisable Main Character
I might be one of the very few who could have taken or leaven the tattoo, skinny/fat/muscular character changes in San Andreas, it was mostly cosmetic and had been ignored in my time of playing, but to bring this back in a more subtle way while maintaining the main characters outlook and demeanour could be a clever way of having customisability. Instead of just clothes changes, maybe introducing haircuts, glasses, facial hair as well could make for a more unique experience. But then this could also be cleverly worked into the game with missions that require disguises, changing clothes/appearances to avoid police or being inducted into gangs. And these are just some examples; there are plenty of other big reasons on why we could be excited for GTA V, whether it be its probable well woven story, more convincing AI or even how the setting (Los Santos) will be shaped and structured. And although its frustrating that we dont know for sure whether any of the listed features will be fulfilled or not we can reside in the knowledge that not actually knowing what GTA V is can keep us anticipated for its big reveal, whenever that will be.