I'm not really a huge army builder, but I do have two of the old Toys 'R' Us Cobra Infantry packs, so I guess that means I have eight Cobra troopers from those sets... But they have different skin tones and hair colors, so do they still count as the same figures? Likewise, I have eight 25th blueshirts, but they're a mixture of the 5-pack, Cobra Legions, single pack, ranking officers, and DVD pack sets, so they have slightly different paint schemes from one another.
If we're just talking about absolutely, completely identical figures that I have more than one of, then it's three JvC Neo-Vipers (the gray ones that came with Wild Bill).
Personally, I see no need to have hundreds of any one troop type (10 is usually more than enough for me), but if it's something that makes other people happy, who am I to question it?
