Thought this might be an interesting discussion. So far in the series we've had the Ammunation, the GTA IV/EFLC underground gun shops/weapons dealers and the CTW online Ammunation so basically which of these would you like to come back or perhaps something entirely different?
For me I always liked the GTA IV/EFLC underground gun shops because you could physically pick up the weapons before purchase. I don't know, but it just felt bad ass for some reason. I also liked the grungy look and feel to the shops.
The mobile dealers of Little Jacob, Terry and Armando were cool also and saved a lot of time if you didn't want to travel to a shop. I think I would rather see those come back in GTA VI. What about you?