@Pit2015
Let's take a look at your game options and mine, and compare (just for the sake of everyone reading this).
You:
Option=GAMEOPTION_COMPLETE_KILLS
Stupid, makes the player hunt invisible units all over the whole world for no reason. Your excuse is also rather unnecessary for another reason that I'll explain later.
Option=GAMEOPTION_UNITED_NATIONS
I use it as well.
Option=GAMEOPTION_ADVANCED_DIPLOMACY
I use it as well.
Option=GAMEOPTION_ADVANCED_ESPIONAGE
I use it as well.
Option=GAMEOPTION_NO_CITY_FLIPPING
Did you literally block the cultural conquest of foreign cities here? I don't recall what exactly this one does, but is yes - it's beyond stupid. Stop making the game harder than even Vanilla.
Option=GAMEOPTION_REALISTIC_CULTURE_SPREAD
I use it as well. Optional, though, since it's somewhat bugged.
Option=GAMEOPTION_LARGER_CITIES
I use it as well. At least this one you allowed, lol.
Option=GAMEOPTION_TELEPORT_HUNTING_AWARDS
I use it as well. Same as above. I'd expect you to make life harder by turning this one off as well, lol.
Option=GAMEOPTION_PEACE_AMONG_NPCS
I use it as well. Again, turning this OFF would make Animals even stronger via constant fighting, so it's funny that you didn't use it.
Option=GAMEOPTION_ANIMALS_STAY_OUT
I use it as well.
Option=GAMEOPTION_RECKLESS_ANIMALS
I use it as well. Simply saves you some move time, because they attack on their own. You think it makes the game harder, but it overall rather helps instead.
Option=GAMEOPTION_INQUISITIONS
I use it as well.
Option=GAMEOPTION_NO_VASSAL_STATES
No. Period. Stop making it WORSE THAN Vanilla.
Option=GAMEOPTION_REVOLUTION
I use it as well.
Option=GAMEOPTION_UPSCALED_RESEARCH_COSTS
No. Doesn't make sense anyways. Costs are built-in, why do you want to increase them?
Option=GAMEOPTION_FIGHT_OR_FLIGHT
I use it as well. As part of the whole bunch of new Combat options. Though. not sure what this one actually does on its own.
Option=GAMEOPTION_REALISTIC_SIEGE
Not my taste. But I agree that it's a bit in the spirit of the game, so I won't complain much.
Option=GAMEOPTION_MORE_XP_TO_LEVEL
Again, WHY THE HECK?
Option=GAMEOPTION_DOWNSIZING_IS_PROFITABLE
I use it as well. Though it's rather lackluster, compared Vanilla. Unless, lol, you bump into money problems, lol.
Option=GAMEOPTION_ADVANCED_NUKES
Kinda useless, but I usually use it as well, not that I ever saw any practical effect of it in my games.
Me:
Option=GAMEOPTION_NO_EVENTS
Not until and unless VOLCANOES are fixed to not spam. And most Events are minor in comparison anyways. So, for now, NO EVENTS.
Option=GAMEOPTION_UNITED_NATIONS
Same.
Option=GAMEOPTION_ADVANCED_DIPLOMACY
Same.
Option=GAMEOPTION_REALISTIC_CORPORATIONS
Optional and kinda "just because", like some other "waaay too late game" options.
Option=GAMEOPTION_ADVANCED_ESPIONAGE
Same.
Option=GAMEOPTION_NO_CITY_RAZING
Very optional, and often unadvisable, but I just love to play in this way to make it a bit (or a lot) harder for me to avoid TURN TIME LAG, lol.
Option=GAMEOPTION_REALISTIC_CULTURE_SPREAD
Same.
Option=GAMEOPTION_LARGER_CITIES
Same.
Option=GAMEOPTION_UNLIMITED_WONDERS
Because I can. But, yes, a bit optional.
Option=GAMEOPTION_UNLIMITED_NATIONAL_UNITS
Just like the one above. Optional.
Option=GAMEOPTION_NO_BARBARIANS
VERY optional. It's actually one of two "game modes" that use - either NO BARBARIANS, or BARBARIAN CITIES, CIVS, RAGING. Both versions are used for different types of playtesting.
Option=GAMEOPTION_TELEPORT_HUNTING_AWARDS
Same.
Option=GAMEOPTION_PEACE_AMONG_NPCS
Same.
Option=GAMEOPTION_ANIMALS_STAY_OUT
Same.
Option=GAMEOPTION_RECKLESS_ANIMALS
Same.
Option=GAMEOPTION_PICK_RELIGION
Always, because I add the Roleplay element to the game, and also because it barely affects my games anyways.
Option=GAMEOPTION_LIMITED_RELIGIONS
Don't know how most people play, but I kinda have a "permanent Religious Victory condition" mentality, see the point above.
Option=GAMEOPTION_INQUISITIONS
Paired with the one above and for the same reason.
Option=GAMEOPTION_DIVINE_PROPHETS
Optional, but I like it this way. I could play without them, though.
Option=GAMEOPTION_REVOLUTION
Always. It's often very annoying, but it's also one of the most CORE features of C2C.
Option=GAMEOPTION_TECH_DIFFUSION
Funny how you didn't use this, because it helps AI a lot more than it helps the player.
Option=GAMEOPTION_WIN_FOR_LOSING
Like the one above.
Option=GAMEOPTION_NO_TECH_HANDICAPS_FOR_HUMANS
Yes, I do NOT cheat, lol.
Option=GAMEOPTION_NO_NEGATIVE_TRAITS
I like to Roleplay, so I like to mix-and-match my traits. This one is both a very core feature of C2C, and one of the strongest ones. Oh, and some AI actually benefits from this.
Option=GAMEOPTION_PURE_TRAITS
Coupled with the one above.
Option=GAMEOPTION_START_NO_POSITIVE_TRAITS
This one as well.
Option=GAMEOPTION_LEADERHEAD_LEVELUPS
Kinda duh.
Option=GAMEOPTION_COMPLEX_TRAITS
If I use it, why not use ALL of it?
Option=GAMEOPTION_SIZE_MATTERS
This is where we clash the strongest. I see zero reasons NOT to use probably the BEST feature of C2C. You do yours, though.
Option=GAMEOPTION_FIGHT_OR_FLIGHT
Same, but because once again "all or nothing".
Option=GAMEOPTION_HIDE_AND_SEEK
As well.
Option=GAMEOPTION_WITHOUT_WARNING
As well.
Option=GAMEOPTION_FIXED_BORDERS
VERY optional. I don't even know WHAT it does, to be honest.
Option=GAMEOPTION_GREAT_COMMANDERS
Duh. Wait, why isn't this in your set? Oh, Commanders, not Generals. Well, AI uses them, so why not?
Option=GAMEOPTION_INFINITE_XP
YES, PERIOD.
Option=GAMEOPTION_XP_FROM_ASSIGNED_SPECIALISTS
Because I can.
Option=GAMEOPTION_DOWNSIZING_IS_PROFITABLE
Same.
Option=GAMEOPTION_ADVANCED_NUKES
Same.
Well, now it's more obvious, lol.
I go to sleep now. Dont make the world a save place for somebody. 
