I loved Dichronauts. It was a tough read but like you say, very rewarding. But I'm really struggling with Diaspora. I think I just find the concept of life living within computers.... kind of dull? It just doesn't seem that far-fetched to me, it seems self-evidently obvious, so his exploration of this isn't really holding my interest.
I agree with you about that, but if you persevere into the second half of the book it becomes really wonderful because of other plot points that I won't spoil for you :-)