For me, changing handlebars on a bike changes the bike's character more than anything, because it affects rider position so dramatically. My Super Course came to me with drop handlebars. I've had all-rounder (slightly bent upright) bars, forward bending bars, north road bars on it. For a while, I flipped the north roads upside down, but I didn't like that. Currently, it has all-rounders with bar ends added.

I can't find a picture of the bike with the drop bars.

It currently has these all-rounders.



But as I said, it has bar-ends on it now.



Before that, it had these weird so-called Ergo bars.



And before those, it had these aluminum north roads, which I regret I installed on a bike I sold.