I like going into that empty building with a bunch of windows in staunton island (and not the internet cafe or whatever)... and then just shooting a ton of people with the rocket launcher on the streets...
and then the tanks come and I try to torch as many as I can (the flamethrower and molotov cocktails are the most effective weapons against them) before one of the marines is able to out of the tank at a good angle and kill me
I also like getting the FBI on me and seeing if I can make it to the respray shop...
it's quite fun...