If it's variety and small aircraft you want, then a company like Netjets probably offers a lot more of it than your average bush operator anyway. Those guys go to hundreds of different airfields in all kinds of far flung remote corners of Europe, and every day is a new and different challenge.
Even in the airlines it's not all repetitive and boring, it's not all 14 hour long haul flights, I work for Vietnam Airlines and our A320 and ATR72 fleet goes to all kinds of weird and wonderful places with short runways and big mountains and non precision approaches. Trust me, you won't get bored flying into a strip like Dien Bien or Luang Prabang in the rainy season
I suggest you keep doing your research and think outside the box a bit