I would like to see homemade weapons, but not just melee weapons, but an IED type bomb that you add anything from hand grenades to some type of toxic chemicals that are lying around your house or from an illiegal weapons dealers.
Personally, I just want some type of shoulder lauched and/or vehicle lauched SAM's because taking out chopper in GTA 4 was a fucking pain in the ass. Except for police choppers they flew right in to my missile.