I used to have straight bars on my Ridgeback Genesis fast-commuter. It was a nice bike, but I found I needed a change of hand position for climbing hills and avoiding pins-and-needles. I put on some bar-ends, and they were fine as far as providing extra hand positions. My favourites were the curved Profile bar-ends. I found I could stretch out on them for a bit more speed, a bit like a poor man's tri-bars. The problem was they looked hideous. I tried about half a dozen and they all looked wrong. I later worked out it was because of the slight backwards and upwards sweep of the bars. If the bars are dead straight then bar-ends look ok. Then I joined a tri club, and I discovered straight bars were just outré, so I changed over to drops. I found I rode with my hands on the tops a lot, and on the hoods quite a bit. I never found the hoods that comfortable, and I rarely used the drops. If I get another road frame, I might put on profile bars (or bullhorn bars).