I think you should be able to comendeer ANY vehicle you see, wether it's in a cutscene or not it shouldbe drive-able. But I want to see:
.Combine Harvesters that chop up peds
.Steamrollers
.A C-5M Super Galaxy w/ enterable/ loadable cargo bay and functioning cargo doors
.A super yacht similar to Daphnees in Max Payne 3's campaign mission; "SUN TAN OIL, STALE MARGARITAS, AND GREED" w/ a full interior
.More realistic police cruisers ie; realistic sirens (as mentioned above)
.A police SUV for Los Santos a Police Clavaclade and for Grapeseed a Ranger (seen in San Andreas)
.A small private jet like a Gulfstream G-650 (the Shamal from San Andreas) w/ an enterable interior
.A passenger train similar to an Amtrak Superliner (the Brown Streak from San Andreas) w/ fully explorable passenger cars
.A B-2 Spirit ,just for fucking around with bombs!
.Better damage models
.MUCH BETTER engine sounds/ tire screeches ie; for 18-wheelers screeches, the sounds that the trucks made in Final Destination 2's opening sequence
.A bunch of different trailers for Semis; Tanker, logs, box, pipes, liquid nitrogen, car carriers, boats, construction stuff, flatbeds, and hoppers
.A tractor attachment; those slicy thingy trailers that look like giant lawnmowers w/o a seat, it just tows it
.Military trucks ie; the H.E.M.M.T. Oshkosh truck in convoys on the road
.A BTR
.A MH-53 Super Stallion (un-armed variant of a Pave-Lo) w/ seats in the back, and one guy in the back can shoot at shit
.A Huey w/ guns on it
.Better helicopter crashes ie; more death yaws n' such
.A Bell/ Boeing V-22 Osprey tilt-rotor heliplane
.A septic truck
.Police men/ women on horses...PO LEECE HORSEEEEEEZ
.The wreck of a cargo plane in the middle of the desert w/ guns inside of crates, basically an Uncharted 3 easter egg...opa story time!
Your driving down a desert road as Trevor and see a smoke cloud in the distance, you go offroad and start heading towards it. After like 3 minutes you get there, and there is a wrecked C-5 in the middle of the desert, with a huge cloud of black smoke towering above. You stop the truck and get out and start searching the wreckage; you find a crate full of military grade weapons, so you take what you want. All of a sudden there are humvees closing in on the crash site you take an AT4 off the sand and get ready to let hell break loose...