Call of Duty?... World at War (WW2 the perfect setting for a shooter)
Primary weapon?... Something big, I like the heavy machine guns during campaign. They're not so good online though.
Secondary weapon?... Not sure of it's name but I like to have the option of the machine pistol with the cylindrical magazine along the bottom of the barrel. You get it first on the Rusky sub in campaign.
Equipment?... Frags, can't go wrong really.
Perk?
Killstreak?
Class set up?
Killstreak set up?
Map?
Game type?... Free for all as there seems little co-ordination anyway online so why not be on your own team to start with.