Checking my Steam account the last games I bought are
Niche: Technobabylon, Astebreed, Vessel, Cosmochoria, Tengami, Secrets of Rætikon, Armello, Morningstar, Train Fever, Hand of Fate.
Popular: Life is Strange (before you question the popularity of this game: It already has more than 280.000 owners on Steam alone), Pillars of Eternity, Cities: Skylines, Star Wars KOTOR I and II, Age of Wonders III, Napoleon: Total War.
Guess I lean more to the niche side, but I have nothing against popular games, if they're up my alley.