The army I have collected longest is the Imperial Guard, and of the many models available my largest collection is of Valhallan Ice Warriors.
Rebranded the XXIV Romanov Rifles in my own games, this army is entirely metal, and the first squads were bought in 1990.
Currently the army is organised into a command HQ with five heavy weapon squads, plus 3 infantry platoons, each comprising a command squad plus four infantry squads.
This is the entire infantry component of the army.
The Command HQ - Captain Nicolai Kasmaranov, Commissar Ivana Karbanová and Commissar Yarrick.
The Romanov Rifles mortar section. Motto: "LOS is for Losers"
First Platoon, lead by Lieutenant Bondarenko
Bondarenko is kept on the straight and narrow by Commissar Molotov and Father Leontev
Second Platoon, lead by Lieutenant Novokov
Novokov personally loads the bolt pistol of Commissar Pechenkin (sometimes with live ammunition, if the enemy is not too scary). Father Sadova turns a blind eye.
Third Platoon, lead by Lieutenant Dubkova
Dubkova has the support of Commissar Brezhnev and Father Asimov
This is the basic standard of painting for the army. I'm very proud of this considering that there are close to 180 models.
One final pic... of a converted flamer with OSL flames.