Mix or match?

Since the arrival of the new Dwarf book, I've started digging through my stockpiles of Dwarfs. People that know me will probably not be surprised that there were slightly more models than I remembered. They're a real mix in terms of age, with some of them dating from well over 20 years ago. It will be interesting to see how they all come together.

Speaking of which, I've been trying to work out how best to go about planning and assembling my units. I had originally assumed that I would simply group the models of similar appearance together, but this would result in a number of units with very similar, static models. The Clone Wars, if you will. I might be able to convert some of them a bit to add some variety, but Dwarf models are not that dynamic and there would be limits to what I could do. 

The alternative is to deliberately mix the various eras of models between units - spread the identical models out as much as possible. This would give each unit a little more dynamism, but it would come at the loss of a coherent theme for each regiment.

So I guess I need to decide, do I mix things up or do I keep them grouped in nearly identical units?

Here we have our candidates, from left to right: Fantasy Fighter, Multi-pose Clansman, Skull Pass, Single Pose and Old Metal.

The picture above shows what I am talking about. The numbers are roughly as follows: 

• I have about 40 of the Fantasy Fighter guys, who have a combination of 2 different heads and weapons. 
• I have about 40 of the multi-pose guy, most of which are not yet assembled. 
• I have about 50 Skull Pass warriors including several command groups. 
• Thankfully I only have 10 of the old single-pose guy, who would be very hard to convert beyond a weapon swap. 
• The old metal guy is almost a place-holder. I have about 20 of these guys, and they vary wildly in appearance as you might expect from looking at the Imperial and Norse Dwarfs of yesteryear. Even if they just roll around in a unit by themselves, there will be no lack of variety in their unit. But they could be used to break up less varied plastics.

So I guess I am looking for some opinions. Do I mix things like crazy and try to turn every unit into a rabble unified only by colour schemes, or do I launch Attack of the Clones?

I should point out that this is purely for Warriors regiments. I have more specific models for the specialised stuff, including Longbeards.