I have all of the shotguns gold. I also have all but Kap40 gold though that should be finished this weekend.
I don't care to get anything else gold. Honestly I only got the shotguns gold because it was pretty easy. I only want the pistols gold so I can have a diamond Executioner. I find most of the gold/diamond camos to be gaudy. I prefer the weapons with no camo though the alternating gold/diamond magazines on the Five Seven are pretty unique.
You don't like the last 2 headshot camos? They're like no camo, but with more style.
The MP7, MSMC, PDW, Skorpion, Vector, and working on the headshots for the Chicom CQB right now. I want all the SMG's diamond since that's all I play with normally. I might try to get the crossbow diamond after I hit prestige master and are bored with the game...
If you think the cost of training is expensive, imagine the cost of ignorance! GamerTag:ONTHEFLY350YARD