Handlebar style is a matter of individual comfort. Interstate vs Roadster. Rearsets vs. stock pegs. Tall rider vs. short rider. Stock seat vs. Corbin or Dunstall, etc.
At 5'10" I prefer Euro bars on my Interstate with rearsets, but US bars on my Roadster with stock pegs and Corbin gunfighter. For the clip-on crowd the fully adjustable Tommaselli's are hard to beat.
Stock Triumph bars have a bit more pull back and suit my buddy (shorter) on his stock 'S' model just right.