I'm not sure that "genre" is the best way to classify the games though. Perhaps a better way to classify might be "whats the main conflict/task the characters will be doing"..
"Who Done It": is a really cool one - as the characters will be doing lots of interviewing, investigation etc.
"police drama": is similar, but there is more action involved - chasing scenes, investigation, "interviewing/beating up".
Shadowrun is a nice one - its the "heist game". But i'd like more about "making a plan" and having that effect the game (which wasn't touched on in 1st and 2nd ed)
but a "heist" can be sci-fi, modern, horror, fantasy etc. But the core would be the heist - a goal, a plan, the action, twists.
A "political intrigue" game could be fantasy (feudal lords/barons), criminal (mafia and gangs), scifi (dune) etc.
or the genre of "superhero" has a few different ones - are you doing a power fantasy of doing pulpy adventure/feats, or are you doing a more "with great power comes great responsibility" game - the price of power, or are you doing a "woe is me, my life is ruined secret identity battle with demons" superhero game?
Anyway - my starting list of things i'm interested in are:
price of power - how does having power change the character? Do you fall to corruption or inspire?
(light/dark, virtue/vice, etc)
Intrigue - backstabby politeness, assassination and manipulation.
(spying, misdirection, factions, double-agents)
Rise of empires - gaining territory, followers, moulding a culture. Being the King/Emperor/Mafia Don
(resource management, loyalty of followers, epic warfare, territorial clashes, )
Pulp Action - heroes fighting villans, beating them up and crazy adventures.
(punching, acrobatics, derring-do, epic mysteries to solve, over the top feats)
Any of these could be sci-fi, fantasy, horror, etc. But game mechanics which support these types of "genres" would be awesome to know.
edit: oh yeah.. i'd love a rpg system to play in
this world.