I'm going to go and check out whether or not the Trains we've seen in the trailers are drivable like they was in SA, if they are, I'm going to check if they're derailable, that'd be pretty fun to see what it looks like with the current gen Physics, once I've done that, I'm going to go jump into Trevor's boots and find a plane to see how the airborn handling compares to that of SA, then jump out and watch it Missle into the first cop I see, or the Blimp! that'd be fun! - Then I'll just HAVE to check out Car Customization and see how that works! I'd say out of everything I've seen/heard, that's what I'm looking foward to the most, personally.