Games I enjoyed in the past are Civ 1-5, Xcom, Sins of a Solar Empire, and Supreme Commander (a real time economy/war game).
Any suggestions? I'm willing to buy the game from you (Steam) using Bitcoin!
Europa Universalis IV, great game
if you liked civ 1-5 you'll like this too, I loved civ5 but I consider europa universalis IV even better
much more diplomacy so I find it more realistic
it's going to take some time until you figure it out but once you do, you'll have hours of fun
my only regret is that it didn't start earlier 7th century - 12th century so I can play with the Croatian Kingdom but even this way I got my kingdom trough rebellions against the Hungarians
I love the way you gain vassals, make royal marriages, alliances, how other nations love or hate you because of your actions, it's all related, everything makes perfect sense
btw if you start playing don't mess with the Ottoman empire, they're the strongest nation in the whole game
there are some bugs like I noticed a few countries with different religion that they really had but you can still convert them, it's even better that way, more challenging