(Playing the Skaven overlord: so good!) Anno Domini 1257 is pretty cool as well if you don't mind messing with real people and places. and Warsword: Conquest because it's set in the world of Warhammer Fantasy. I like Prophesy of Pendor as well for all the neat RP-stuff it's adding, like joinable knight orders with quests. If you like messing with politics, you really should get Sword of Damocles: Warlords and/or A Clash of Kings (I prefer the earlier versions like 1.2), both mods include the politics mod and SoD:W even expands it quite a bit. The Nords are just too strong with their infantry and the Vaegirs have always been good all round, although I feel that's not the case in the mod anymore. The Vaegirs are my favourite faction as well.

I think it's time to go home and pledge and figure out what's wrong with my favorite faction. Until just now when Vaegirs lost two main centers within span of a week to the Nords. After a hundred days all factions held their ground quite firmly reclaiming most of the territory they lost. Kingdom powers seem to be quite balanced while I rode around hunting bandits and a doing short term mercenary work. The way troops level and become veterans is quite interesting and like most other changes it makes a lot of sense. I only wish I had chosen a higher difficulty than normal. Pikes and bolts still provide grave danger. I just reached level 30 playing a 'meathead' hero (24/24/12/9) and as a heavy horse archer I'm dominating tournaments and battlefields alike. I must say Silverstag is my favorite mod now.

Mount and blade warband native mod