When it comes to discussing Warframe, I can say a lot of stuff. I can mention a refined game system, which updates even further over time. I can praise the developers, who obviously love the game they create and are fast to bring us the new stuff. I can say that Warframe is the first game that attracted me with its unique style.
But the thing that I love the most is the setting lore - well, its scattered parts, which are brought with every new update. The lore is by far the most original thing in the game: how about a well mixed coctail made of space adventures, roman and japanese culture? Don't forget the feeling of waking up in a cryocapsule and realising that there are very few left of your nation, if any, and everyone else in the universe hates you.

Purchase CK2 if you like Song of Ice and Flame franchise, the politics part in particular. Or if you would want to dive into the Middle Age game setting. Or to develop your character as a really cruel ruler. Or a people-loving monarch. These are the examples, the possibilities are endless.
But remember that everything in this game has its cost raised high, and you may lose everything within a blink of an eye. This is what makes me love the game - the real risk of being brought down. That said, I wouldn't recommend CK2 for those expecting easy walk through the game.

God it's so EPIC