I find it interesting how my personality surfaces during the game. I love to take care of "my" people, and I take strong offense to sneak attacks by the AI. So I built up good culture to make my people happy, and I put a lot of investment in defence to keep my cities safe. I also value education, I don't want my people at a disadvantage of being relatively uneducated on the world scheme, so I spent a lot of effort on research.
I also happen to be quite competitive, and when I saw the GOTM results that trounced my own, I decided to get a bit more aggressive. There were lots of ways to optimize general skills, but my main weakness was being too passive.
I noticed that the successful GOTM players are very aggressive in expanding early on, before I thought it possible. In fact, they tend to leave defences a bit light, stressing a strong offense. For defense they use trading to keep AI happy. So I tried that and I was surprised at how well it worked. My people are happy, the friendly AI is happy right up until I back stab them, and I win the game by a larger margin at an earlier date.
So how does such a victory make me feel after spending 30+ hours on the game? I like that I do better against others in the GOTM rankings than before, but I don't like my methods. I get all countries to love me, and then I destroy one at a time. So playing recent games has been somewhat a compromise that leaves me feeling somehow off balance, lessening my overall enjoyment of the game.
Then I read about the ultimate victory: a complete cultural, no city attack victory. I forgot who posted it, but it was quite impressive. Simply using culture and selected skirmishes (to take out wandering armies, not to attack cities), someone won in a big way! That strategy appeals to me on all fronts, I will try it in a non-competitive game (i.e. not a GOTM) next time around to see if I can pull it off.
The game definitely has a lot of options for you to explore what feels right to you.
I just had a thought. Perhaps I should try a shared game, teaming up with some players with different, so that together we can build an empire that shines above all others. My ruthless partner can slaughter the neighbors for his brief reign, and then I could bring culture and peace during mine. That sounds pretty interesting.