*Raises hand timidly.*
I liked Riley a lot until the end. He was so sweet and so caring and so... well, he was also kind of hot when he fought those demons. He was the kind of guy who could have given Buffy that "life in the sun" or whatever it was that Angel talked about but still had her back out on the Hellmouth, too.
That said, I wouldn't change a thing. I thought his story was really interesting. I mean, he's the guy who does everything right -- or so he thinks. He's like the WWII era archetype of manly perfection. He's patriotic and strong and capable of protecting home and country. His looks are good -- all clean cut and plasticy. But he's sort of in the wrong era. Girls (in this case, Buffy) are still attracted to that type, but there's a problem: that type can't handle women who can beat them on their own turf or at their own game. It was neat to see how he dealt with (or didn't deal with) loving a woman who didn't "need" him, but just wanted him. The insecurities that it brought out undermined their relationship. It was neat to see that he appears to have resolved those insecurities enough to be able to move on to Sam, who really does seem to be his other half (and if I remember correctly, also his Captain). I thought that was an interesting, true-to-life, and important issue for BtVS to explore.