IO is correct.
You need to find a setting and/or theme that pleases you, a story that you want to continue, a tone that you like, and a ruleset that suits; and then hope the combination will produce characters you want to RP with and for.
Good luck.
Speaking of which, Roll to Great War: Blackadder would be a good game. You are going to be sent over the top at dawn tomorrow, and have 24 hours/turns to get out of it. Lighthearted.
The Apprentice: Siberia. The players are apprentice shamans and must pass various tests including confronting carniverous reindeer and psychodelic moss. Horror. Psychodelic doesn't look like it's written right.
The Priests: Rural Ireland Version. The players are priests in rural Ireland and must serve Mass, administer to their flock, that kind of thing. But something goes awry, and instead of competing for promotion to Bishop, the priests must join forces to combat the greater threat. Gritty and ultra-detailed realist.
Best Man. The players are members of a stag do and end up 300 miles away from the wedding, which is tomorrow. They have lost all of their clothes and money, and must get the groom back. Unfortunately they are horrifically drunk and so use a special 1,1,1,3,5,6 dice. (3 is my least favourite die roll, as a GM.) Farce. (obviously, but there are many tones that would work well with this - what if they've just woken up to find one of their members brutally murdered, and all of them covered in his blood?)
Roll to Brian. The players are competing holy men during the Roman occupation of Judea. They must compete for followers, but also avoid being put to death.
I've got a couple more but lunchtime is over.