As an officer, I always go Scout/Recon/Beobachter/insert Italian word. It gives me a rifle, binocs and smoke grenades, all I need to guide troops in battle, atleast on wide maps, when going into villages I always take the standard NCO kit.
For me, taking a kit depends on the map, what I feel like and how I play that day. Fall of Tobruk? Spawn with a SMG or AT kit or pick up a sniper rifle. Lebisey? Just AT.
Other people seem to stick with 1 kit always, atleast thats the impression I get.