Yeah, I really like Kingpin from Daredevil as a villain too - he seemed more interesting honestly, but then you have more time in a TV series to round out characters than in a 2 hour movie. Still, I think one of the reasons Loki works better is you know some of his motivations - he's jealous of Thor and always felt like he was second best. It definitely would have been possible to develop Ronan more - sometimes even a single line of dialogue can inform viewers about a character and add depth. I think they missed an opportunity on that. Schmidt was another villain that worked for me, and again I think it's because you know something of his past by the end of CATFA - he was meant to be the first supersoldier - the first Captain America - and things failed. One of my favorite villains was Khan from the original Star Trek - his history with Kirk makes him a great villain, and his unwavering obsession to get revenge. On the other hand, Darth Vader works great as a villain because of the mystery - he's encased in a black suit, and goes around strangling people... the mystery was somewhat lost with ROTJ, and the prequel trilogy was interesting in that it gave back story - but I'm glad I watched the original trilogy before the prequels, or that mystery would be lost. But having a brooding space alien with power needs a back story in my opinion, because in Ronan's case it didn't feel like mystery to me, it felt like the writers didn't spend enough time developing him in the course of the film. So it's not actually the character, per se, that I have an issue with, it's that I simply wasn't given enough information about him during the film... like sitting down at a steak dinner and you only get one bite, then it's over - not what you expect, and not enough.
