I actually got back into riding about 3-4 years ago with a Fuji Absolute flat bar hybrid. I'm done with singletrack and off road stuff other than gravel and dirt roads at this point in life, but wanted something other than a pure drop bar road bike. I've got thousands of miles on that Fuji and still ride it frequently on shorter rides. I put the Ergon grips with bar ends on it for multiple hand positions to solve that problem on longer rides and they did the trick. I've resurrected a vintage Motobecane road bike recently, and it took some time getting used to using the narrower drop bars. I seldom ride the drops, but do enjoy the ride. It's not that I'm more comfortable or confident on straight bars over drops, but it's just that it feels different.
Cheers