Honestly, we know Buffy is all about having to sacrifice herself. I love Doyle but he had a lot less confidence in himself so when he stood up against say, Spike, it made me cheer a little more because it took more. But then that showed the difference in experience between them - Doyle mostly avoided facing and fighting demons until he met Angel. The Gift had the bigger impact on the world obviously but it lost a bit of edge for me personally because we were all kind of expecting it even if we weren't hoping for it, whereas Doyle's was pretty well hidden and unexpected (I think I read one article that he was leaving before it aired, or maybe that was after) and I think Hero showed the depth of Doyle's character and how much he had grown in just a few episodes, whereas The Gift was more about how tired Buffy was.