I started collecting units from the Dogs Of War that interested me as extensions for my Empire army. Also the rules offered some great stand-in opportunities, especially where the GW figures were terrible: Vikings for the Bearmen, Samurai for the Duelists, etc. Those that I have completed have followed a similar theme to my Empire force.

Alcanti pikemen

Braganza's siege crossbowen

Paymaster, Moneylender, Mercenary General
The paymaster and moneylender are Foundry Spartans.
I really liked the models, and their crests fit in
nicely with my DOW.

Witch Hunters

Limbered Artillery Battery
Some of my favorite GW sculpts.

Giants and Druid