I really enjoyed Rendezvous with Rama when I read it as a sixteen year old. The sense of awe, the scale, the mystery: it was great. But nothing much happened and the story didn't really go anywhere interesting.

I eagerly read the sequel, hoping it would unveil the mysteries, but it felt like it was not written by Clarke at all (I suspect Lee wrote it all). Instead of wonder, sci-fi and reveal, it was more about the human relationships of the astronauts and less about the sci-fi.