CTF obviously,
The emotional reason: It’s the mini game I have played the most in my life, I’ve made many friends there and have been played it for quite some time already.
The gameplay reason: CTF is full of that suspense and adrenaline when you finally manage to take the flag and run for your life to capture. And when you finally manage to capture, the satisfaction is incredible. In core you just gotta hide and break the wool.
The Logic Reason: CTF games can end faster if you’re a good player. Therefore more exp and statistics gains. Also, CTF is more popular so game start faster.