Utopias are by definition tedious because a utopia is an end to history and as such an end to meaning or negotiation of how to live. A utopia is always an end to a story or Freedom with a capital f. As Dostoevsky points out in Notes from Underground, on man in utopia:
"[he] would purposely do something perverse out of simple ingratitude, simply to gain his point. I believe in it, I answer for it, for the whole work of man really seems to consist in nothing but proving to himself every minute that he is a man and not a piano-key! It may be at the cost of his skin; but he has proved it!"
Another way to phrase it. If you are in a utopia, you cannot be in a democracy that entails the possibility of ending it. Which is to say, you can't govern yourself at all. And that is why Ian M Banks culture is nothing of the sort. It's a society literally controlled by "perfect minds" using a Sapir-Whorf like language to manage the behavior of its people. Even Banks who tried to write a positive utopia and that's not his fault, couldn't imagine a utopia that entails the possibility of rebellion.