I love both CR and QoS, to be honest. In my mind, QoS is a wonderful follow-up to where CR left off. It was going to be very different in feeling and tone because Bond is a completely different place emotionally and in terms of his goals.
I suppose I view it a bit like Dominoes. CR sets up the character, delving into various aspects of his personality, as well as the world that surrounds him. When part of that world dies with Vesper it paves the path for what we see in QoS: It's essentially a relentless quest on Bond's part to uncover the truth about who was behind Vesper's acts and infiltrating MI6 that invariably results in losses along the way (Mathis, Fields).
Interestingly, one of the things I remember most about QoS in many ways is how beautiful some of its scenes are. For example, I adore the opening shot where the camera pans across the water, towards the winding road surrounding the lake. Orchestral music is mixed very effectively with the engine sounds which take over at some point.
And then there's what's probably my favorite scene in the Opera House where Bond runs into Green and his henchmen. It's beautifully filmed, and I love the way everything just falls silent for a brief moment, everybody holds their breaths, and then all hell breaks loose, accompanied by music from the Opera itself.
If taken on its own, it would probably rate a little higher then it does with most people. But when it is inevitably stacked up against its predescessor, it suffers in the comparison.
Interestingly, I get the exact opposite feeling. I think QoS works because of the emotional setup from CR. Without that I think it would be very hard to understand the true motivations behind what is going on, making it harder to become invested in.
In fact, at some point I was wondering if some of the dislike from QoS came from the fact that people weren't really used to carrying over so much material from one Bond film to another. They've usually been much more self-contained then these two.
Having said that, I hope the next Craig Bond will pick up where CR and QoS let off. I think it's a great starting point and a world and a Bond I want to see a lot more of.