I have a couple questions, none of them really worthy of their own thread:
1) different games
- play minority cultures and spread them. Vendish, basque, ossetian come to mind. In some cases you need to take care and 'breed' a right culture ruler. (there are no basques at start for example)
- conquer some extreme places, give it to a duke you like, then load up as him and declare independence. I mean places like a sane catholic would not go, like Nubia, Lower volga (Itil), Baghdad...
- don't use the best law setups (feudal contract + salic consanguity) but stay with royal preorgatory
- start as historical losers and change their fate (saxons dukes of Willie the conq, Norway vs. England)
- form a strong, historical country, then abandon and form an other one. (like create historical portugal, then save, load up as count of Varna and form Bulgaria)
2)
loyalist: definietly possible until your liege decides to attack you, which sometimes happen. when your regiments are borrowed, put maintenance to 0, and your liege will pay for the upkeep!
3)
Good russians?
Kiev is quite rich, but has strong enemies nearby (Hungary, Poland, cumans) who want that wealth. Actually the Kiev-Chernigov region is probably the most interesting in the game.
I also enjoyed Moscow, since their CoA is übercool, plus in the first scenario, they are NOT ruled by a Rurikovich, which is a plus!
Also, some rus princes in the 1377 scenario are vassals of pagans! Kiev is vassal of Lithuania, Yaroslav is vassal of golden horde! Those are really interesting and challenging games!
In general, be sure to check out the 1377 scenario! There are countries there which are not challenging in 1066, but in 1377, they will make you sweat. (not just russian vassal of the horde, but Denmark or Byzantium too!)