If you've never ridden a three-cylinder motorcycle, I urge you to throw a leg over one as soon as possible. I fell in love with the first triple I rode, so much so that I bought it. The linear ample torque that fills the rev range, top-end rush, and unmistakable howl make me happier more often than any other configuration I've tried or owned.
Now, I say you should try a triple ASAP, but your options are limited to a handful of bikes from Triumph or Yamaha's grin-inducing CP3, which I sampled earlier this year. But if, for any reason, you don't like bikes from those manufacturers or the dealership support isn't good in your area, you're more or less out of luck, bar getting an MV Agusta.