To me, Mount & Blade: Warband is one of the best games you can get on the PC. It has a amazing Singleplayer expereance and a fun Multiplayer mode. All this from a indy team. Also the DLC is good for some musket action. If you don't have it yet you should grab it off steam ASAP.
It was never about the graphics but just the raw gameplay options and openess to the game but now we get the first look at Bannerlord and it looks amazing.