I would much rather have used UAV/CUAV/Adv UAV in MW3 but Assassin is immune to all of it so I had to use Assault killstreaks.
Pretty much the only killstreak setup I used in Black Ops was Spy Plane, Counter Spy Plane, and Blackbird. I rarely used lethal killstreaks in that game, really the only maps I ran the Chopper Gunner on was Jungle, Array, and Nuketown, mostly because I don't like those maps and I wanted the match to end faster.