The one you are most interested in. It doesn't matter if the game you create is the most popular period or just monkey wars. If it's well put together people will play it. But you will not finish it, if it's something you are not interested in yourself. The kind of time it takes to build a game, you can't devote yourself to something like that without a desire.
Just my 2 cents.
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+++ Divide By Cucumber Error. Please Reinstall Universe And Reboot +++
-- (Terry Pratchett, Hogfather)
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